do u have any issues with ATi?
if i remember correct u have already said ATi hadn't made any profit this year.
FYI: Hd 5750 is a great card than 9600gt/gso, it's better than geforce 9800gt but peform similar to geforce 250gts. The card can play modern titles in high settings.
Of course I have issues with ATi, they can't seem to get their act together when it comes to their drivers.
Now, the 5750 is right around the speed of an nvidia 9600/9800 series card, and below the 250GTS. The 5770 is a bit faster and a better card, but the Nvidia 260 and above stomp all over both of them. If this user wants the game to run "smoothly" than an Nvidia 260 GTX, or better would be a safe bet. CPU speed is really not the factor here as the Athlon 64 x2 is really not that out of date, it almost compares to a e6300 core 2 which is not great, but not bad either.
PowerMac 9600(1 ghz G4)
ATi 9200 PCI