So the commander was from like 06-10 and was a 7-passenger SUV with either a wimpy V6 3.7L engine or the V8 5.7
The trailhawk did the Rubicon trail with ease and comes with a factory lift, full skid plates, and sound capable except I dunno about this new engine.
There's two conversion kits for the JK...one I think is straight from Mopar and is the JK08 kit and it converts the JK 2-door into a pick-up style truck. Kit costs about $8k installed though I believe.
The other one is the Brute kit and that will cost about $10-12K to modify.
I have heard that by 2015 or 2016 they will have another 7-passenger SUV that they are naming the Grand Wagoneer (going old school!) but I haven't heard much as to capability/engine/MPG and the likes.
I really like the automatic sway bar disconnects on the JK Rubicon's and lockers are really nice when you're wheeling. Our next big mod is lifting another 2" throwing 33" on with a belly-up kit, front and rear ARB with a wrench. Skid plates are always a good starting point for new jeepers because they're pretty low cost but will protect your transfer case, fuel tank, and important underbelly items.