Take a look at the new Cooper Radial STT as well. Very good, triple sidewall. Basically a variation on the Mickey Thompson MTZ's I have for offroad use.
I ran ST's in 31" and 35" size and they were great tires in all conditions, though the void isn't big enough to be a serious mud tire. I really liked them though.
Maxxis are made in Taiwan -- if you get Coopers you'll be buying an American made tire if it means anything to you.