definitely either hte 770 or 280x. They're pretty close. I personally would get a 770 b/c radeon has lost my trust with all the horrible drivers over the past few years. I used to be AMD fanboy, now i only buy Nvidia GPUs b/c everything actually works as it's supposed to! the 760 4gb is a waste.
at 1080p, none of these cards are going to use over 2gb of VRAM... only at 2560x1440 or 5760x1080 would you even start going over 2gb.