I'm going to be contrarian a bit... First, there's a lot of good advice so far, so take what i'm about to say with a grain of salt.
1: You already have a Taco. I don't know what model, or if that's a lease as well, so there is that. If I had a Taco, it would be one of the 4 door TRD Off-road versions, and I wouldn't have my Trailhawk, simply because the Tacoma is a very capable and proven off road vehicle, and if I already had a Tacoma, I wouldn't have needed/wanted another 4x4.
2: If you have any desire at all to go off road, a lease is probably not going to work for you. I don't think they'd appreciate leasing something you're taking off the pavement. IMO, leasing something you intend to off road is just not a good idea at all.
3: As was mentioned before, there's very little aftermarket for the Cherokee KL. It's growing, but still quite limited, and if you have a leased vehicle, you're probably not going to be doing much to it anyway. Nothing that involves drilling holes, lifts, cutting the bumper for a winch (the RRO winch bumper), cutting pinch welds, or any of the other things that require physical alteration.
4: If you're not going to be off-roading, you don't really gain anything in the TH package other than looks. If you want to pay a premium for looks, be my guest, but you'd be just as happy with one of the lower trim models and save a few grand to boot.
All that said, I do love my 2015 Trailhawk. I also bought it, not lease, and I take it offroad. So far, I've not torn anything up, but honestly, it's just a matter of time. I would not, personally, have picked a lower trim model simply because I bought it specifically for the off-road capability while still balanced with good on-road and long-distance comfort and behaviour.
The Trailhawk models (and all the Cherokee KL's I suppose) are great on road and on long distance trips.
So that's all just my opinion, take it for what it is.
2015 Trailhawk Mango Tango - All the option boxes ticked