The board that's been catching my eye is the ASUS P5W-DH Deluxe, it's getting a lot of good press and it's tried and true. it's a pricey board but so are most of the decent Core 2 Compatible boards. Also beware that whichever board that you buy you might also need to do a bios update to get things running and an extra socket
775 chip on hand if you have it, wouldn't hurt. As an over clocker I've steered away from Intel boards because they have in the past limited the adjustments needed to effectively over clock because Intel would like you to pay more for the speed gains.
I'm no big fan of anandtech but their list of boards should be helpful.
http://www.anandtech.com/mb/showdoc.aspx?i=2797&p=19
Before buying a board take special care to insure that it is compatible with Core 2 duo, many boards of the same socket type are not.