I think the GF4 MX 440 (the 64MB one is a lot cheaper and almost exactly as fast as the 128MB) would suit your needs. That will keep you under $45. Next most expensive (but still affordable at under $65) is the Geforce FX 5200. If you're willing to go a little higher, I recommend the Geforce 4 Ti 4200.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS