I like the KK. I agree its better looking than the KJ, it reminds me of a mini-Commander as the front clips are so similar. Aren't they a little smaller than your XJ?
Only thing I would question is do you really need a front locker for this? I would think a rear lockers worth would be the hardest I'd wheel this thing. I say do it and build it up like you did your XJ as a "do-it-all" vehicle.
I was just listing the available mods that I found.
Good question on the specs, though. Legroom front and rear is a bit bigger. Inch or two. Interior width is actually a bit bigger shoulderwise, but hipwise is a bit tighter.
Cargo room is quite a bit bigger overall, length width and height.
No idea about track width or overall exterior width/length, though...
What's nice is the winch mount puts the winch high up and doesn't effect ground clearance at all. That way if I put a 1.5-2" lift on and went up a tire size Approach, departure and breakover angles would only improve.
The real test though, is going to be actually putting 3 carseats in the back, and taking it for a drive...might do that tomorrow actually.