I've had most of these tires at one point or another...
MTR's just suck, they're good for about 10,000 miles before the noise will drive you nutts. they're no good in the mud and rock we have here in the southest either. On road, no sipes so slip in the lughtest rain wet streets. Snow, well deeper snow may work, but ice and pack will have you spinning.
LTB's, awesome off-road, but oh my goodness they're terrible on the road. LOUD, not round at all for the first 10 min. of driving on the road on cold mornings. No sipes either.
TSLs, great off-road, like the LTB's on the road.
TSL SX's, surprisingly quiet on the road. Nice hummmmm, unlike the stinkin' annoying drone of the MTR's, I had these in the 38x14.50 size. Off-road... the best tire you can have in the mid-south mud and rock. Just a rediculously strong and sure-footed off-road tire. I love them.
TRXUS MT's, awesome in all the conditions I threw at them. Long wearing, excellent in the rain and snow, off-road will beat the MTR's hands down in the mud. They have many sipes for excellent road traction.
BFG MT KO's 33x10.50x15... Not bad on the road and half worn at this point. Off road do ok in the mud. Wet streets will loose traction easily. Snow, forget about it on the street. The other thing I really notice with the narrow tire, is rear end sway, on the jeep that is...

They're too narrow in my opinion for XJ's or my ZJ for that matter.
BFG AT KO... you can't beat them for a dd that sees occassional off road. Off-road they do well in the rocks, but be carefull with the sidewalls as they're pretty weak. In mud, they're terrible as expected. On the road wet weather, and snow traction is excellent. You also will be hard pressed to wear these suckers out. I was waiting to wear a set out on my first XJ to buy the TRXUS's, and finally had to give in after 40,000 miles. I sold them for 100 bucks, and the dude drove on them till 80,000 miles on his Jeep TJ.
I'm putting some 33 or 35x12.50x15 TRXUS MT's on my ZJ this spring. Best all around tire in my opinion. Sping will do a better job on the road, and the deep sipes and staged lugs make this a great tire in any condition.
Go with the wider tire for your rig.