Basically i cant decide between a higher clocker nvidia 680 with 2gb of vram, or a lower cloced 680 with 4gb of vram, this is all for single monitor gaming, and no i dont want a 670, please don't sugggest tha because i have the money atm and i want to spend it on the best card i can possibly get.
id just get a good gtx670 like the msi power edition. i have no idea why you want to blow your hard earned cash (unless you won the lottery or something)
the most elitest 680 right now is the msi lightning gtx680. its better than the 4gb classified because you can actually overvolt using software (the classified needs this EVbot which costs a extra 200 dollars). msi will probably do a xtreme edition where it has 4gb of vram.
if it is a single monitor, id just get the 2gb. you cant use the 4gb buffer if your not running multiple monitors