I've got load range E KM2's and I love them to death. in their defense, it's the only grade the 265/75R16's come in, and, popping their bead will be a great challenge, since the tire shop had great fun trying to get them to seat because the bead's a reinforced one, and was so virgin tight....that and the wheels on the OR apparently have "Great Beads" as I was told if I ever pop the bead on those I was doing something very very Very VERY VERY wrong....
as far as ride comfort, I keep them at 35psi and they're actually a smoother ride than my stock rugged trails were. also, I have much less tire bulge from the weight of the vehicle itself...my stock ones always looked like they were low in the front because they sagged too much...