Upgraded myself from x2 550TI's in SLI to x2 GTX 770's....Life is good again!My performance in BF4 is awesome with the two 770's...most likely one of the gurus here will chime in about a single 780...which I would have done but did not have the budget(wanted two cards).All in all...I am one happy camper with my two 770's.

Nice.. looks like I'll be getting a EVGA GTX 770, but which one.. hmm.  Right now, I am on a single display, 22" 1920x1080, with eventual plans for a 3x display for a NVIDIA Surround.  Been looking at getting one of the 4GB versions, but really not sure if it's needed.  Right now I am mainly playing BF4, DayZ SA/Mod, ARMA3, and a few others.   Is there a real benefit of having a 4GB 770 over a 2GB version atm?  Like I said, I will be setting up a multi-display system soon'ish down the road, along with adding a second 770 for SLU.  I am also ordering a Z97 mobo to start my Intel build (finally saying by-by to AMD..) along with the GTX 770.    

Eyeballin the 770 4GB Classified.  But, I will want to add a waterblock to it and add it into my current w/c setup.   Which I can't seem to find a waterblock that fits the GTX 770 Classified anywhere.  I've heard the 680 Classified waterblock fits, but can someone confirm (or kill) this?    

The extra memory would help with multi-display, that's about it, so if you're not planning to get more than 2 monitors then don't bother, the 2Gb version would do fine.
 
I've got 2 monitors (27" running 1920x1080) and my 2Gb has no issues, in 3D, no issues, but, I think if I get a 3rd monitor then I would like to have that extra memory. Note that every rig will differ, so don't take my word for it, my set up works for me, but it might not work for you.
 
As stated in my previous post, eventually one day when I find that games catch up and my card can't handle it, I'll drop the cash on SLI and bigger PSU, but for now, I don't think I'll have to worry about it for another 6 months or so.
 
If you are looking for water blocks for your card/s, try perfomancepcs.com, I usually buy my gear from these guys (in bulk when I do big upgrades). Prices are good, they have a ton of stuff and delivery is reliable (I've had 3 orders so far).

Little update.. 
 
I decided to skip all that above pretty much and purchased a 780 Classy.. Waterblocks are pretty readily available for it.. so that made the decision a little easier.  :)