My Q6600 is pretty much as far I can go on my current platform, and i7 is way to freakin expensive to switch too. The new PIIs have temped me, but I have no idea which motherboard to get. My only requirements are that it has at least 6 USB ports on the back and have two slots between the first and second PCI-E slots (for crossfire, the extra space really helps keep temps down). I was looking at the Biostar T-Power TA790GX, but it doesn't have crap for USB ports. Thanks for the help with this guys!
EDIT: Since I run with no side panel, please no Gigabyte boards, they are too ugly to even think about getting.