You have a 4:1 transfercase, I would still go 4.88 or 5.13 and give yourself a stronger ring and pinion.

 

My local service floor has been good to me, but they would not likely honor my drivetrain warranty. So darn picky nowadays.

Concerning power, IMO besides a regear (depending on tire size) the newer JK's with the 3.6 and better auto tranny seem pretty optimized short of a supercharger/engine swap.. Just did not think it would be worth it for a person with a spanking new Jeep to change intake/exhaust for questionable gain, and risk warranty hassle before having enough miles to be sure the drivetrain is sound.