well if you dont mind going micro atx then this asus rog board is quite good and meats your expectationshttp://www.newegg.com/Product/Product.aspx?Item=N82E16813131759
when looking for a good OCing board look at the size of the vram heat sinks [they are located around the cpu socket] if they are quite large then they are better for OCing than a board that has small heat sinks. look for 8 pin power at the top instead of 4 pin, thats also another good indicator, and last a black board is another indication. http://www.newegg.com/Product/Product.aspx?Item=N82E16813157250http://www.newegg.com/Product/Product.aspx?Item=N82E16813131729
these are a few good contendors. 2 asus products and an asrock, gigabyte also makes a descent board. read a some reviews on a few of your favorites, go for the highest rated you can. z68 is what you normally want to go for, but there are some good p67s out there, when i chose mine i got the best rated z68 board there was that suited my color scheme, at the time it was a gigabyte board, now there is a lot more options.
you might want to think about the future and get one that supports ivy bridge and pci-e 3.0, a lot of asrock and msi boards have 2 pci-e 3.0 slots and a 2 asus boards have it. as for ivy bridge i am not entirely sure