Def get the hybrid cooler first if you can only do one or the other, you will see the most cooling bang for your buck outta that for sure. Make sure you install it the right way though... rad higher than the card with the tubes going down then slightly up to the card. Preferably install the rad in the front of the case to pull cool air through it and put a exhaust fan on the back of the case to pull hot air out. You want positive pressure, more cool air going in the case than exhaust air out, so it helps the convection and it will help push dust away from your case. Cases are a whole other animal, its a really personal decision, there are tons of makers, models and gimmicks. After working on pc's for so long I really will only build full towers anymore, for myself or others, because everytime I do a mid tower case for someone they end up complaining about thermals eventually.... same situation your in now. Nothing I hate more than doing a job for someone and getting a phone call months later that theres a problem, and like a sucker I always help people out, usually for free depending on the circumstances. I also see why your seeing the higher temps too, its that monitor your using with the 120hz, gsync, and a lot of pixels, that would def make your card use more vram and make your pc set aside more pagefile.

The123364
Is everything included in the hybrid kit or do I need any extra purchases? Besides maybe a couple of 120mm Noctua fans. I already have X3 140mm Chromax (Black) fans and I plan on maybe buying 2 more 120mm for the kit.

Think everything is included (even one 120mm fan) if I remember right, even has paste pre-applied, but I replaced it for 2 noctua fans for better temps and its also quiet now and replaced the paste as well for kryonaut (since I have a lot of it).

Thanks, guys. I ordered the cooler, but I was curious what fan speed should I get? And also wanted to confirm that they were 120mmm, or can you fit 140mm on the cooler?
I was thinking of just getting X2 "Noctua NF-F12 PWM Chromax.Black.swap,"  because of color, but looks like newer ones are out: "Noctua NF-A12x25" so was curious which one is the better choice.
 
Also, I read the post by M1aSocom2 saying he tried x2 "Noctua NF-F12 iPPC 3000 PWM" with success so I was curious about those as well. Would NF-F12 iPPC 3000 PWM outperform NF-F12 or NF-A12X25 if they were running at the same speeds, say anywhere under 1500. The NF-F12 iPPC 3000 are expensive though so might not be my route. I am more curious about NF-F12 PWM vs. the new NF-A12x25. 
  

All I needed, thanks! Will update once I install. 

Yep NF-a12x25 are the new fans, really quiet until around 1-1.2k rpm (it depends, mine are really quiet up until that rpm) and all I can hear is just some usual wind noise, no bearing or whistling or turbulent sound, just air being moved a bit.

I actually use them on my kingpin in push/pull atm (intake), never get above 45C with 1.2k rpm, 43C with 1.4k in a 23C room, they are really good and all I can hear is some air being moved.

GTXJackBauer

Mcwrah
I actually use them on my kingpin in push/pull atm (intake), never get above 45C with 1.2k rpm, 43C with 1.4k in a 23C room, they are really good and all I can hear is some air being moved.

Those are really great temps you got there.  You don't even need to spend $100s on a custom loop because you'll get similar temps. 

Well I still plan to do it for aesthetic reasons and because I plan to use 3x 360 rads in lian li case, should have a tiny bit lower temps and also lower temps on CPU by few celsius lol. At least from what I read that should be the case, 41C or so max in gaming with that kind of rad setup for the gpu.

Mcwrah

GTXJackBauer

Mcwrah
I actually use them on my kingpin in push/pull atm (intake), never get above 45C with 1.2k rpm, 43C with 1.4k in a 23C room, they are really good and all I can hear is some air being moved.

Those are really great temps you got there.  You don't even need to spend $100s on a custom loop because you'll get similar temps. 

Well I still plan to do it for aesthetic reasons and because I plan to use 3x 360 rads in lian li case, should have a tiny bit lower temps and also lower temps on CPU by few celsius lol. At least from what I read that should be the case, 41C or so max in gaming with that kind of rad setup for the gpu.

Well I was referring to your GPU. 
 
Yes, if you went with lots of rad and added the CPU on top of the aesthetics which are really nice these days, you should see improvements all around as long as those rads are getting some of that 23c ambient air, nom nom.

The123364
Would love NF-a12x25 in black and 140mm. I am sure they are coming.

120mm in black are almost done, so soon in stores. 140mm are being designed, they had a model of how they look so far at computex.

Of the Noctua fans you've tried, does that include the new  NF-a12x25? Those are the ones I am interested in. 
 
On another note. Which of the Thermal Grizzly pastes is the one I should use on my GPU? I have a little bit of "Grizzly Kryonat" left over that I used on my CPU-is that the same one? I also plan on cleaning another older GPU so I may order more anyway so I am double checking.  

Update:06/23/19
 
Hey guys, just wanted to give an update on my build after buying evga hybrid kit for the 2080 ti.
 
Some thought when I was putting the kit together:
 
First, of all, I actually received the wrong instructions manual in the box but I found it online so there's that...
 
 
The installation process was pretty smooth and straight forward with a couple of questionable steps though.
One step told me to "wrap the fan cable that connects to the VRM heatsink around the pump in a counter-clockwise manner," but the cable is too short to do that so I just bend it in half on itself and ran it through the groove and held it in place with the rubber spacers as best as I could (I was harder to secure the rubber spacers in there because the groove was more compact due to folding the cable in half).
 
Another weird step was "Insert 4 #12 mylar washers" into the four largest holes in the back of the card, but the washers were a little bigger than the holes to just drop them in nicely. So I dropped them in the best I could and forced them with the screws when it was time to fasten the pump with "#8 spring screws"-I ended up looking ok but I still wonder if that was proper to do.
 
Lastly, I question my thermal paste apply method. What I did was make an "X" pattern on the gpu and lines around the pump heatsink (just the round areas not the middle).
 
I just started playing with the card again so I will get a better idea of performance in a few more days of use. However, right away the difference is noticeable. The memory at it's hottest seems to be running at 76, and an average of mid-60s.
 
 
I have +120 on the clock and +800 on memory and this gets me 2100-2130 in games while staying under 76 degrees and the fans not running faster than 65% and are still pretty quiet. As before with the air cooler, I was running the same overclocks but averaging 2030-2070 (rarely) while having fans at 85-95%, being super loud and memory getting to around 84-86 degrees.
 
My only disappointment is the pump noise. This is my first hybrid kit so I don't know what normal pump noise vs. excess pump noise really is, but when I am not gaming it can be pretty annoying. Having said that, it's not bad but I can definitely hear it and it can get in my head even though the sound damping on the Fractal Design R6. I really want it quieter if I can though, ideas are welcomed. 
Oh ya, and the price dropped $20 after I bought it and I had to pay shipping...(trying to forget that part).
 
Other thoughts:
I decided to change from the Noctua NH d15s cooler to the Kraken x72 because the hybrid kit tubing would not go in my case very smoothly. So far no problems with the Kraken x72. It is actually very quiet and the fans don't seem that bad.
I also decided to change the stock fan on the hybrid kit to the Noctua NF-A12X25 PWM and my god I love these fans. I wanted to do a push pull but I don't have extra radiators screws and I was wondering where I could get some for my second fan.
I have 3 more Noctua NF-A12X25 and was thinking of replacing the fans on the Kraken x72 but I don't know if it's even necessary-I just didn't know what to do with them since I have them anyway. In fact, I did try it, but the radiator screws that come with the Kraken are too short for Noctua fans. These fans have extra anti-vibration pads and that added a bit of more clearance.
Also, I was thinking of changing my case to a Lian Li 011 dynamic and maybe get creative with my extra fans and radiator. What do you guys think of this case?
 
In conclusion, I still have to do more testing to see if the hybrid kit is stable. If I can lower the noise a bit my build will almost be perfect at this point besides maybe a new case. Suggestions on case upgrades, what to do with extras Noctua fans, or how where to mount either the evga radiator (currently as rear exhaust) or the Kraken radiator. or how to lower pump noise are welcomed. Thanks for getting me this far guys!