I have had great luck with the KM2's.
They have been on my TJ since around 2010. I have a friend that daily drives a set on a Toyota Tacoma and he has over 70,000 miles on them....but he keeps a good check on the air pressure and rotates them religiously. i have no clue how many miles i have on mine because the odometer does not work. i will only buy KM2's to put back on it and based on the mileage my friend has gotten. why buy an all-terrain tire if you can have a mud tire that will last that long....and get good traction.
KM2's may cost a little more then some others, but they far out last some of the opptions out there.
And by then you will have to buy two set and the BFG's will still be going....from what i have seen.