Gotspeed_2000
EVGA_Best,
The HP Omen 3080 is not the same as the AIB 3080s.  If you are not overclocking or pushing anything super crazy it should be okay for you to use.  I haven't played with it yet, but I've seen the HP Omen 3080 earlier this year in a HP Omen I rebuilt.  A friend also bought a HP Omen with the 3080 and Intel 10850K late last year.  We took almost everything out of that pc and used only the cpu and gpu to improve performance.  Did my friend have to do this mod to the pc, no.  But he wanted more stable and reliable performance so we changed the mobo, PSU, case, nvme drive, ram, and AIO along with adding a ton of fans to his wife's pc.  
 
The HP 3080 has the same Nvidia parts as others, it comes down to board design and parts used by the AIB tend to be better than the stuff HP does. 
 
There will be short comings in cooling as the HP cases tend to suck.  Also in my friends wife's pc it had a 120mm aio which was not sufficient in cooling the 10850k it came with.  Also very limited in fans and venting caused thermals to be higher than they should. 
 
I'd look at other SI's before I'd buy a HP omen to be honest.  You might pay a little more, but you get brand name parts which are easier to switch out and/or provide much better performance in the long run.  
 
This is one from newegg that is similar, actually a lot better than the HP:


https://www.newegg.com/abs-ala251-gladiator/p/N82E16883360155R
 
This one cost a little more, but it comes with AIB parts and a better CPU.  The mobo is solid for most users, brand name RAM with decent speed, 240mm aio, and gen 4 nvme.  
 
The psu might be a bit light on power, but should be okay.  The GPU is not brand specific so you might get lucky with a asus or evga, but even if you get a gigabyte or zotac it would be better than the HP imo.  This does cost a bit more than the HP, but it provides you so much better clarity and performance in the long run.  
 
Looking for something like this from a System Integrator would be a much better deal in the long run for gamers who want something to last and are able to do their homework.  
 
 

Gotspeed_2000
EVGA_Best,
I'd look at that pc I linked.  It looks like a decent pc and you wont have to wait so long for the parts.  It looks decent, the only thing that I would consider changing would be the case and adding more fans.  
 
I bought my son an Omen about 5 years back cause I didn't want to spend a ton of money on him gaming at the time.  I didn't do my research into as I had a long break from building pcs (like almost 20 years between builds).  For the price it was good for simple gaming, but if you are playing AAA games, then tbh I'd look at a SI or custom build your own.  For my son's first rebuild of his Omen, I looked at adding cooling and HP mobo didn't have any flexibility to add cooling.  That lead me to do more research and then plan a full rebuild of his PC.  I only kept his I7-9700k from his initial HP Omen that had a 1660 as a gpu.  If you look at their parts, HP does cut a ton of corners to save money and add to their profits.  
 
A 3070 with 8 gigs of GDDR6 ram and the processing cores specs does not give you a lot of head room for future proofing your pc.  To me, it should give you about 2-4 years of decent experience at 1080p gaming.  If you go 1440, then you have to sacrifice some of the resolution to max out your frame rates.  This is a personal preference as I like to have high frame rates in FPS games.  A 3080 non TI is still a great option when you consider cost to performance factors.  I still strongly recommend the non TI version of the 3080 to those who ask me to build PCs.  10 gigs of GDDR6X ram along with the processing cores provides a lot of headroom at 1080p gaming while to offering excellent performance at 1440p for future games as well.  
 
If you look at the PC I linked, it is specd with a 3080 already.  Look at those parts and do some research on the mobo and stuff and it should result in reviews that are solid for gaming.  They might not be the best, but the budget is what the budget is.  I started out with my first build with a X570 Tuf board and it paired well with my 3070 FTW3 ultra until I went full overboard with my PC build.  I still have that mobo and plan to use it to upgrade my son's friend computer in the near future.  
 
The biggest thing is the time it gets to obtain the parts.  Buying through an SI is a excellent option if the funds allow to bypass waiting.  Although you wont know what brand GPU you are going to get, the price is decent and the wait time should be fairly short.  
 
If the 3070 if from a retailer who is an authorized retailer then that might be a good option.  I overpaid by 50 bucks back in January for my 3070 which I then used to step up to the 3090 through EVGA.  
 
I would not buy from a 3rd party if possible.  Even buying a little over retail for a EVGA gpu is worth it since you will not have an option to extend the warranty should you buy from a non-authorized retailer.  You also wont have the option to step up the gpu either if you buy from a 3rd party.  
 
The other thing you might want to consider is the rumored pending release of the new 30 series gpus which will have their ram on the front side of the gpu.  This new release is something you might want to wait to see since the performance of the GDDR ram will be better with the ram on the front side getting cooling from the air radiators instead of on the back side which is currently no really cooled by anything.  Since you are waiting, you might as well wait and see what comes out later this month or early January.  I'd still actively look for a 3080 non-TI if possible.  Best buy drops seem to be something to keep and eye on along with the new egg shuffle.  
 
I won a 3060 TI a couple of months ago on the shuffle which I plan on using on a graduation gift for my son's girlfriend who needs a new pc for graphic arts.  You have enter a ton of times, sometimes you get lucky but being persistent usually will pay off in the long run.  
 
If you are willing to drop that kind of cash on a 3080 TI, I'd wait and see what the 3090 will be.  The price difference isn't too much, but you get double the amount of VRAM and it should be easier to get.  Also, if the new 3090 super does come out, then that would give you a ton of headroom to grow with.  I love my 3090 and currently I'm in the middle of the process of converting my KP to a water block so I can add it to my system.  The 3090 provides you a ton of options and headroom to play games in for the future.  I'm thinking I'll get 4-6 years atleast of playing most games at 1440p at high frame rates/resolution.  

CptT95
I believe step up to the 3090 is pretty quick nowadays iirc, but I could be wrong

Harriman
kindly look up the RAIJINTEK Zofos Evo,....RAIJINTEK..... THAT! thing looks like you could park a BUICK in there!!!,.....( and is my Next-Gen case if i EVER get my 3090 Kingpin,... needed a case that could handle MULTIPLE 360 Aios )