The Quadro FX is a pro-level card. 3D designers et al. If you're getting it for games best bet is to stick one of the ATi cards in there, or like you suggested wire up multiple 7300s. Theoretically the drivers for 3D cards will be easier to make cross-platform with the Intel switch, so my money's on the divide growing smaller. Er, except that Dell now pwns ATi, so nVidia have the advantage. The processors for the Intel mobos are upgradeable, too - you can
stick a Merom in a Mini.