hd 2600 pro replacement

[classic]

i am currently using iPC with a hd2600pro and am currently looking for a replacement...

i have a amd 6000+ sb600 chipset system running on iPC 10.5.6 with 9.5.0 voodoo kernel... what i want is a graphic card that is faster then the hd2600pro... but not so fast that the cpu will slow it down but at the same time which will be supported by netkas pc efi graphics enabler.

or should i switch to nvidia?

what do you guys think?