....it is reported that a top of the range Geforce 3 card will out perform a budget range Geforce 4. You may wish to consider this as GF3 cards are cheap and will become cheaper still when the 5th series of the Nvidia card is released shortly.(Also known as the GeforceFX)...
Or you could save a bit more cash and opt for the high -end: Gainward Ultra 650 XP 'Golden Sample'.
Hope this helps.