If you have a CrossFireX enabled motherboard then two cheaper cards might be a better value than one expensive card. I currently use two HD7770 cards running in CrossFireX
http://www.newegg.com/Product/Produc...82E16814121642 though you might want to look around as there is probably a better value card for $100 to $150 each. You could also try two nvidia paired cards with SLI. Of course you will need a good power supply. I am using the Ultra LSP750 Power supply.