Good point on what they'll be used for. For 70/30 surfaced/unsurfaced we'd pick either Geolandar A/T-S or Toyo Open Country A/T (we're on the latter now), for more like 60/40 with a fair amount of rough track the BFG T/As are good. Having said that, the Toyos have done a good job for us in dunes and rough corrugated roads (for example the GRR - 3-1/2 million corrugations, by our estimate). When we replaced a blown Geolandar A/T-S the only ATs available were BFG T/A and Toyo OC A/T - we chose the latter on the advice of the guy at the shop, on the basis that he considered them a s good as the BFG and more economical. They've been good so far.
I did 25+ years on BFG-AT's (KO), best I could get was 45,000 plus on a gas engine, and about 43,000 on my diesel version. My truck tires were kept in a state of mileage rotation every 5,000 miles, with TP tread measurements dictating rotation. These were my best longevity reaches. Because BFG became so proud of their tires ($$$), I was forced like many. to look for alternatives..
I settled on the Toyo AT 2, as the price, durability, milelage, were all what I was looking for. The Falken Wildpeaks would have been my choice, but at the time the company was in-between the gen 2 and gen 3, and my size 285x75x16, were not available. These have gotten good reviews for toughness in rocks (little or no stone bruising). My BIL has put 3 sets on his truck. They also get fairly good wet weather reviews. As a cheaper AT tire, they might be something to look into. Mileage should come in between 43,000-50,000. Do rotations, and monitor TP for any crowning or cupping due to pressure.
****There are some tire threads somewhere on here, that go over those selections mentioned above. Hopefully somebody can link them or a moderator can merge them together.****