I have a 2011 jku Sahara. We traded our 08 town and country because of its crappy tranny, just to find out that Chrysler stuck a modified version into the 07 to 11 jeeps!!
I am running 35's and have had them for the last 24 k miles with no complaints. I did regear to 5.13's.
My friend bought a 2012 jku rubri, and I personally did not see what the hype is all about on the new 3.6 liter. I will tell you the 3.8 has great low torque, but sucks passing towing a 2000 lb boat.
I would got with an used 2013 model, as I heard many complaints about the pent star motor having issues in the 2012 wranglers. Also, you get the much better automatic tranny!
We are now in the market for a grand, and I was hoping for the diesel, but the 46k price tag is unreasonable for me. I am not sure what Jeep is thinking. Why I base model diesel?
Good luck. Spend the extra money now, than later on repairs.