Well u might be a little disappointed when the dx10 games are going to come out (first ones probably Q1 or Q2 of 2007) and u can't max out the settings. Thats just how it goes, a dx9 card (no matter how good) can't use all of the stuff dx10 has to offer, ofcourse u can run the games very well, but u just can't enable some options.
But well, I don't mind playing games even if I can't max out the settings, the game is still as fun as it would be with the nice graphics.