I replaced the wifi/bluetooth card that came with the motherboard with the Intel 7260 card and had a similiar issue. The standard Windows drivers worked fine, but installing the Intel drivers caused the card to disappear and a "Unidentified Device"...
I installed a G.Skill Phoenix Pro 120GB on this board and so far it has been fast. I would recommend using the Intel SATA ports instead of the Marvel ones. As Martin said, you really can't go wrong with the Sandforce drives.