I don't which card to buy between the vapor-x 7970 3GB and the EVGA GTX 670 4GB ?

I want to have a Skyrim modded like hell.

I have good specs.

The more V-RAM the better for Skyrim, also I would leave ATI out of the equation, they tend to be problematic with games and Skyrim's no exception. I've got 2xGTX580 (1.5GB) in SLI and while the horsepower's high I have V-RAM problems at times; granted I am playing on a 30" @ 2560x1600 though.