I switched to Cooper Discovery AT/3s for our F250 about 4 years ago. Had KO2's liked them but they wore out in about 20,000 miles. Had them rotated every 3,000 miles and even had them flipped on the rims. Out truck was 2wd at the time.
Coopers are quiet, work great on road and off. We now have about 25,000 on them and 40% tread still.
ALTHOUGH - I did put two new Copper AT3XLTs on the back in December as we were going to Baja for 10 days. Thought the rears needed more traction for the trip.
Worked great.
On another idea. Tire road hazard certs with America's Tire (same as Discount Tire) , I never bought them - ever! But when we started off road camping I decided I would get them for the truck tires. I have used them 3 times now saving us a good amount of money. Twice the side walls were cut from rocks while off road, they had no issues and just replaced them no questions asked. All you pay is for a cert for the new tire and mounting. The best part is life time rotation with re-balancing of each tire for free everytime and I do it every 2,500 to 3,000 miles.
We got a new (one size up) AT3XLT for an older AT3 that we got side wall damage on in Baja. I went from 285/70 17s to 285/75-17s with the AT3XLTson the rears.