I'm building my first gaming rig, but I cant decide about the graphics card.I already bought a gtx 670 2gb 2 days ago , but I'm worried about the Vram problem. I'm not planning to upgrade for the next 2 years.Do you recommend me to return the 2 gb one back and buy the 4gb version or SLI 2 x 2gb ? I want at least 60 fps in every game, especially metro 2033 , with tesselation, advanced DOF, and antialiasing(8xq or 8xMSAA+2x2SS) maxed out.I will try to overclock but not much.I will mod skyrim and everything.