I'd step up to the Gigabyte 970A-UD3. That's the cheapest board with enough power delivery bits for some heavy OCing.
If you can, try to find the rev2 or rev4 versions, the rev 3 had issues. If you do end up with the rev 3, don't worry, somebody here (forgot who exactly) has a beta bios that is supposed to fix said issues (CPU throttling).