i would look for a X800XL , it has 16 pipes and is priced fair . with ATI and NVIDIA releasing new cards , you might find a good deal on a 6800GT , or X800XT , which the later is somewhat faster than a 800XL . ooppps , there is also a X800GT that is supposed to be good and cheap , havent research that one thou, might only be pcie. 38
EDIT , i ran a 9800pro in this board for a month or so , it wasnt a bad card , time has just marched on hehe