I'm currently running two EVGA GTX 260's w/ 216 cores, superclocked and running SLi. Looking at the newer cards out there since I don't follow the latest and greatest all the time. Question is should I be looking at upgrading to a newer VC? I don't need SLi if a single card will be better than what I have now. Looking in the $200-$250 range. I'm a casual gamer with CoD, Chrysis, etc.. Any opinions?