I would highly recommend the Toyo's. I actually run the M/T's on my truck, in 285/75/16, but each tire is rates at 3740 pounds at 80psi. With my first hook to my 5er, I crossed the CAT scales at 18010 with truck and trailer, dry weight. I forgot to air up my tires and only had about 35psi. the sidewalls deflected slightly, but were still manageable. I did bump to 75psi, and all was good.
My father-in-law has the A/T's, and they are great tires. Tread is good, service is good, and warranty is excellent at Les Schwab. Toyo is an up and comer in the tire market, but they have proven themselves time and time again. The tread is slightly more aggressive than the Michelin's, so figure it this way, if you gotta go up in them thar hills, you'll have some meat to do it with.