the gtx 280 is meant for people who want to play at 2560x1600. if you don't play crysis, or you dont play at that high of a resolution, then the gtx280 is a mistake to buy. nothing beats the gtx280 at those resolution, and as always, a single card is ALWAYS better than SLI or Crossfire/CrossfireX
So I look at your specs, are you saying that you made a mistake?
Samsung 24" 245BW