4WD does installs. If you're really not into installing it yourself, call them.
I say do it yourself. A JK lift is EASY. You need a big breaker bar, 19 and 21mm sockets for the wheels and track bars, and otherwise, a regular metric socket and wrench set. 2 jacks will make life easy, and 2 sets of jack stands, just in case. Maybe $300 for all of it if you have zero tools. Still under the cost of an install! Add a good torque wrench, maybe $360 or so MAX. 4-6 hours under your rig learning how it went together, and no need to go complaining to someone else when they screw up!
If you stick to a straight spring and shock swap, it's an EASY job. If you have a buddy, and an electric impact gun (BUY ONE! $50-75 and cuts down on time and effort BIG TIME!
), maybe 3-5 hours for both ends.
Read the directions for the kit, and post up on here for any questions you come across. I've done several lift kit installs on JK's- they're EASY. As long as you're not having to weld anything, there's NOTHING to any lift kit I've yet seen you can't handle with a MINIMUM of technical knowledge and standard tools- Mark W.