I just installed the AEV 2.5 a couple of weeks ago. It handles fantastic both on and off road. I also have a '14 and I did the work myself. If you have the tools and are mechanically inclined, save money on the install and do it yourself. I'm glad I did and now I know a heck of a lot more where things are and how they work underneath.
Black 2014 JKU Sport S, 6 speed manual, 3.73 rear end, 2.5" AEV Dualsport XT w/ Bilstein 5100s, 255/75/17 Goodyear Wrangler A/T, Rubicon rock rails, front grill mesh mod, Jeep door sill guards, matte black Jeep grill emblem, matte black exhaust, Synrgy upper and lower bolt swap(highly recommend), tires pending...