I've always had good luck with BFG ATs. Quiet and pretty strong off road. MTs are better but wear quicker and are much louder. I've heard a lot of people saying good things about the ProComp X-terrains. Supposed to be quiet and aggressive but they are pricey. Grab a 4-Wheeler or Petersons 4x4 and off road mag and check out the 4-Wheel parts tire ads. Lots of good ideas there.
OL