TBH I doubt that purchasing a top of the range card would be a dissapointment, OK your Ram and CPU are going to be a bottle neck but it wouldnt be wasted money.
I have an XP 2400 512Mb ram and a GF FX 5200 (128Mb) Doom doesnt run that well on this setup.
I'd skip the GF 4's and look towards a mid or high end FX.
The ATI 9800 Pro's are tempting, but out of sheer bloody mindedness I dont like ATI. Absolutely no reason for it, except that they are equally as bad as Nvidia for cheating.
If I had a budget and wanted to upgrade I'd go for the 9800 pro, not long ago these babies were the fastest things on the planet.........and thats not bad coming from an Nvidia fan.
