Getting such a powerful card given the specifications would be a waste of money. I would recommend waiting and getting an entire NEW PC. If that's not an option, increase the amount of RAM and perhaps go for something cheaper on the graphics side. Perhaps a Nvidia FX5900 or the Radeon 9600XT.
so you want a new video card for the family pc or yours? if your own, i would recommend getting a 128mb FX5500 or ATI 9600, no need to get an XT since games that require that much video card power wouldnt be able to run with his specs.