I have the AEV 2.5" spring lift under my JK. Improved the ride quality and handling compared to the stock Rubicon suspension. Slightly smoother ride (Rubicons ride stiff) and handles better in turns. I guess that's due partially to the improved spring design and also the rear trackbar tower. Their stuff is expensive, but I feel worth it for a daily driver that sees occasional trails (I don't hit RC as much as I used to, but went to Moab twice in the last 2 years).
Teraflex makes some great stuff, though. I'm a fan of their engineering department. Their 4" lift is on my list for a lift if I end up getting a 2016 4-door (depends on the diesel offering).
If you have a level driveway and can wait for warmer weather, you can install a basic 3.5" lift with standard tools, although an impact gun will make it a lot faster. I installed the 2.5" AEV lift by myself. Would have been easier with an extra pair of hands, but I did it on a weekday.