dude... there is no such thing as a Extreme gaming mobos... Mobos do NOT determine the performance... u may see half a fps difference..
You did not even say what kind of CPU.. Il suppose ur tlaking about a 939:
Abit av8 3rd eye
asus a8v pro deluxe
You might want to check out the PCIe mobos. Also DFI has or is comming real soon with their nf4 mobo.