the MSI Neo2-Platinum is also a very good board. This one and the one Codeine listed are always the two I suggest as the top boards to get for socket 939. Both have more than enough options in the BIOS for adequate overclocking.
For overclocking Socket A you'd want an XP-Mobile and the ABit NF7-S v2 board. 'Bout the best combo right now for overclocking