You should get a Radeon 9100. They are the best PCI video card ever made. They are extremley
hard to come by these days, but I managed to find the only place on the web that still has some:
It only has 64mb, but on a PCI video card you are not going to see any more preformance with more memory, in fact, if you have to much on PCI (like 256mb) it is actually slower than 128mb or 64mb. Also, that card vaderpro pointed out to you is very bad, the entire nvidia FX series sucks, and it only has 64-bit memory, where as the 9100 has 128-bit memory.