I had Cooper Discoverer AT/3 31x10.50x15s on my jeep a while back. I loved them. Great in mud, dirt, and sand, very quiet on road, and they last for a while. They are probably my favorite all-terrain tire.
92 YJ, 4.0, D44/60, 5" BDS springs rear, SOA front, 1" booms, 1" BL, 35x12.50x15 MTZ's, 4.10 gears. It's never done though.