Depends on what you want to use it for. I have an 03 WJ with a 3" lift, 4.10's and a rear locker. It is a great DD'er right now, and family wheeler. It will run blue trails and some blacks all day long. It still has all of the factory control arms, including the rear upper A-arm. Keep an eye on your rear upper A-arm, they like to blow out the bushings faster when you start lifting it. The previous owner of this Jeep had just replaced it on mine, so I should be good for a while. If your WJ has high miles, you may want to check it out/replace it. The lift was an IRO with springs, shocks, 1" TC drop, and misc hardware. I tentatively plan to switch out the factory control arms/A-arm for something aftermarket, but have not found anything I really like yet. I am not a fan of the IRO stuff (I didn't put this lift on) because of the strange adjustable front UCA's they offer.
The front CV axle shafts scare me a bit, I will be switching them out for alloy u-joint shafts eventually. Also, the CV in the front driveshaft too. I need to see if a XJ or TJ front shaft will swap in if I change out the front output on the t-case (mine has a 242 TC). I can see myself swapping in a set of 4" springs and aftermarket control arms, but I don't think mine will ever get any bigger than that. See pic below, lousey cell phone pic, but you get the idea. It runs 265-75-16's with no wheel spacers and no rubbing. Still run the rear sway bar too.