I have a Asus A8N-SLI premium motherboard. At the moment i only have one 7900gt and it works great. The board is quiet because there isnt a fan on the chipset. It uses a heatpipe. I think you should go with an sli board because you say you dont think you will ever go sli but if you decide you want to especially with two 7900gtx that would be freakin crazy fast. Asus makes great mobos and my as an amazing overclocking ability. Mine came with program the i can actually overclock my cpu while in windows not even using the bios. It also shows the temp of the cpu and fan speed.