I'd just go with a pair of pci (yeah, I know it sux but where is a m/b with 2 AGP slots) Radeon 9200 SE cards...or 1 AGP and 1 PCI as SDK mentioned...128 megs each and all you need is a couple of DVI to VGA dongles (unless you are using LCD displays) to be up and running. You can get them for $63.00 (US) at the link below.....

http://www.allstarshop.com/shop/prod...EKRLFHW3A44W2#