To expand on what the other guys have said, the CUSL2 is supposed to be excellent. You might wanna go with its little sister, the TUSL2. Same as the other but with Tualatin support. You might have a little more CPU upgrade room with it.
I'll also recommend mine, the Abit VH6-2. Good options, good cost. There are a few of these floating around in here. It also has a Tualatin version, VH6T.