Just to try and balance the view of the Ge Force mafia
I run Morrowind on an ATI Radeon 8500 and it looks fantastic.
But you are going to have problems running any newer game on that hardware. You should maybe look at the new Radeon 9700 which should be shipping in the US fairly soon if not now. Although to do it justice you would probably need a new motherboard/processor/RAM combination which would get expensive in a hurry!