http://www.ncix.com/products/index.php?sku=38853&promoid=1025 or http://www.ncix.com/products/?sku=3...CBE&manufacture=BFG Technologies&promoid=1025 EDIT: Sorry for title 2 x gfx gtx 260 or a gtx 285 oc edtion
Two 260s will be faster. Whatever you do, don't buy a 285, the 275 is much cheaper and almost as fast.