Same here, I run a EVGA 670 SC 4GB, I use it for triple monitor and it runs everything great with no heat probs, I haven't really had anything that exceeded 2GB yet so the extra memory is mainly for future proofing to leave my options open.
The FTW 4GB was not out when I bought it, but I am really happy with this card.
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i5-2500k@4.8ghz, Asus P8Z68-V Pro/Gen3, 16GB G.Skill@1600, Noctua D14, EVGA GTX 670 SC 4GB, X-Fi TitaniumHD, HAF932, Corsair TX850, Win7x64Pro, 3 x P2310H monitors, TrackIR4, Saitek X52Pro + Pro Rudders + Cessna Trim Wheel, Fanatec GT2 + G27 pedals + TH8RS shifter, Sennheiser HD580+ Modmic
PSN/XBL/Steam/EA/ProjectCARS/MWO:Kludger