regardless of what ppl say i wouldnt get an fx5900 for ET
i upgraded from an 128 gf4 to a 128mb fx5900xt and went from having a pretty constant 125 fps to a very poor sub 76 in most places
although dx9 games ran a lot prettier, et seemed to suffer, that woz also on a similiar specced pc to urs im guessing(p4 2.53 ghx)
although it depends on the level ur playing at, if u need*** 76 fps constant in gun fights then get a 128gf4(tis v cheap too), otherwise the fx5900 is a good card to enjoy all ur games(just remember to dl rivatuner
), as for the ATI cards i’ve no idea how they perform
@ techie ppl 
i realize ppl often say that cpu governs et fps, but i’d really like to know y the gf4 kicked my 5900xt’s ass in et?
edit* although since moving from a p4 2.53 to a amd 3500+(with an increase of a few fps pre o/c’ing) i’ve bin able to get a steady 76fps, mostly tbh due to a larger case with a windtunnel and 3 fanswhich allow me to o/c the card enuff to get 76 constant