if you can find a nvidia 5900xt yet those are some extremely powerful cards for a good price. when shopping for video cards, avoid the cheap lines like the plague! MX's, and whatever the current cheap generation is, is not a good card. most people don't realize that a good card from a much lower model will easily outperform a budget version of a high numbered card.

(geforce 4 mx's were the worse, since the geforce 4 was a good card, the mx line just gave it bad name, and they didn't even use the same chipset!!)