If you look around you should be able to pick up an ATI 9800pro
http://www.overclockers.co.uk/acatalog/ ... 2d005_2dcoConnect3D ATI Radeon 9800 Pro 128MB TV-Out/DVI - Retail (GX-005-CO)
Here is one its on offer at the moment. My bro has one and its much better than my GF4ti 4600. In 3Dmarks03 my GF4 scores about 1300 i think maybe a little less. My bro's 9800pro scores 5500-5700. He can max most things (Except clouds) and run 4x AA and 8xAF holding 25FPS.
They seem to be cheap as the new gen cards are coming out (well should be!!)