There are PCI X1300's out there I hear. That'd be about the best PCI card you could get.
Visiontek just released a PCI x1300 at about $120. I think their is a Diamond version running around $120.
As others have said, how much are you willing to spend on a legacy system?
btw, you could go "all out" and get the BFG 6200 512 PCI card for $150