^ 2x8800 GTS = 1x460 that's pretty decent to run modern games. So OP will last 1-2 years on medium settings.
Im sorry, i misunderstood. I though the OP didnt have the psu capabillities to do a sli build
Dual gpus will give that the power to run modern games, however id be concerned about cpu bottlenecking
I hate to see graphical power wasted by BNing