I say wait for the GTX 600 series or HD7000 series to come out before upgrading. It should bring the current card prices down a bit too. I ran CloD with a GTX 260 just fine on medium @1920X1200 so a 460 should do fine for now. Especially with this new graphical overhaul coming out soon.
__________________
- 2500k @ 4.8Ghz Lapped IHS - AsRock P67 Extreme4 Gen3 - MSI GTX 560 Ti 2Gb - Crutial M4 SATA3 64Gb SSD - 8Gb Corsair Vengeance DDR3 1600Mhz @ 8-8-8-21 RAM - Silverstone 750w Fully Modular PSU - Antec 1200 ATX Case - Zalman 9700 Cooler - Win7 Ultimate x64 - |