I've driven on AT/KOs, and know many with them. They work great in snow, rain, and on ice for about two seasons, then you'll find the tread has hardened a bit, and they won't grip as well in similar conditions. That's normal for a lot of tires, and it's also the reason they wear so long...it's a hard compound.
They are the "gold standard" multi-use offroad tire. Don't expect them to be any good in mud...they aren't, and neither is any other all-terrain tire (really).
They are great in sand, not terribly noisy on pavement, balance well (if the operator is competent), and they are durable...I have folded the sidewall over on a few occasions, spun them against sharp rocks, and so forth.
Maybe someone can chime in with a similar review of the nittos.
I know a few people with Nittos, from their comments I would be equally interested in the Terra Grapplers, as long as they were as durable (3-ply sidewall, etc) as the BFGs.
Since you have a leveling kit, if you don't need a tire for winter conditions you may want to look at the 255/85/16 KM2, which can be run on a stock wheel and is slightly taller than the 285/75/16, but easier to fit as it's narrower. I know a lot of people running that size with great success, on a variety of vehicles.
JP, your alignment is likely off. It may be "in spec", but it's not correct if a 265/75/16 is running in to the back of the wheel well. Search out what DJ has to say on the subject.