xk and a Jk are not the same 4x4. Jk has a old school low and basicaly still a old school Jeep. pull a lever and it clunks gears to get there. Not that Jk's have not issues as well. But not the same issues.
To the OP. One thing you want is 3.73:1 gears, period in any sport. with a auto it will work ok with up to 35" tires. If you can a Rubi gets the 4.1:1 with a standard trans and the auto stock gets 3.73:1 and its a option to get 4.1:1. If you get a Rubicon get it with 4.1:1 no matter what. The auto turns the 35"s better than the stick now with the W580 auto and with 35' tires works well. Off road the new Auto is king out of the box. hands down. on the street it is as well. Its not like the old slush box in the 2011 and down.
If you get a sport with 3.21:1 you will latter be gearing it and the cost of that is not cheap. by the time you replace gear add lockers that are at least equal to what Jeep uses you are into that close to 4k. the D44's used in the Rubi are better and can handle 35"s good, stronger axle shafts. the Tcase the 4x4 low part of this is better as well not just 4:1 low but a heaver duty one going better is 3-4k from the after market.
Of any of the Trim levels at least the Rubicon is not just stickers and rims. it is parts. resale is better on Rubicons as well. people want used Rubicons to wheel with. I hear it a lot, wish we would have bought the Rubicon. Its like camping with bears and not bringing what is need to protect yourself from a bear. The day you need it, is that day of first regret. But they are not cheap especially a Unlimited.