from most reports i have read here, like yours wildman, if you buy the mainboard, you can disable the annoying uefi feature and keep enjoying linux, right? that is very encouraging!
a friend has that mainboard, but its is a bit old, no?
very good but at least 1 year old, that means that probably will work perfectly under linux with the current kernel we have so probably a excellent choice
with what are you going to pair it with, a fx 8000 cpu?
what video card? remember to buy a decent psu, at least 450 watts to be comfortable and work stable so you have a pc to use and enjoy for at least 5 years