This belongs in PC hardware, and the ProSavage is only a good card for general usage (e.g. web surfing, typing word documents, etc.), but for pure power it doesn't even cut it at all.
Minimum level you should go for, for a combination of general usage along with casual gaming is a GeForce2 MX or ATI Radeon 7200 range.
Depending on how much money you want to spend, I would recommend staying away from the MX line of card. For a reasonable price, you can get a GeForce 2 Ti200, and I'd take that over any line of Geforce4 MX's.
Bottom line comes down to what you need it for, and how much you want to spend. As for your current card, GeForce pretty much covered it above