I'm using a BFG NVIDIA FX GeForce 5500 OC PCI that I got at Walmart for 130$. They also have one with AGP port for the same price. So far its working fine with WB5. I had ATI 9200 before, about 99 at Circuit City. The 5500 works a lot better. Some others have had trouble with the 9200 and 9250 drivers supporting WB5. Anything much cheaper will probably have to be found on Ebay, used.