Go to the JK page and read a little. When you lift there are a lot of other things to consider. The following things change and can cause further modification and costs.
Pinion angle on the drive shaft, steering geometry changes, linkages and cables, and with bigger tires for the lift you may have too re-gear your axles to get the power back.
I run an old YJ and went 4" with 33s. Ended up with an SYE and custom shaft, crappy brakes, re-gear I am currently working and axle swap to 8.8 Ford. I have crappy steering and all the fixes for all this is $$$. I have fun and wheel it on the weekends so no issues but check out what you are in for first.
Maybe join a local club most don't charge dues or they are really cheap. You can talk to other owners and see what works what doesn't and what products they used or where they had the work done and how much.
On the JK page there is over 1K people on at any one time and you can get some real good help there.
Do the research, decide what you want your Jeep to be able to do and then have some FUN!!!
89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.
AF Jeep Club Tail #184