Mostly I'd use it to play games, so far World of Warcraft, and some older games. My friend got an x800XL for $250 and I'm pretty impressed by it. The 6600GT runs about $160ish from what I've seen. One of the striking differences between the cards is 128MB more Video RAM on the ATI, besides of course the chips. Still, they seem to perform similarly on the WoW test that Anandtech wrote up. Is that Video RAM going to make a difference perhaps in more crowded situations? Or is it moot?