Once you start lifting a jeep, you start screwing it up. Don't get me wrong, a lift can be great but realize that once you start changing the engineering and characteristics you can't go half way, and it's going to cost you and there are some things you lose. Like power, milage, balance to name a few. A 3.5 lift requires so many changes. That's fine if you want to go through with it, but I've had the best luck with all my jeeps, when I put on a 2" lift and ran 32" tires and went with 3.73 gearing. I kept my milage, power ratio, balance, and didn't have to change driveline, pitman, brake lines, odometer gear, spaced rims, etc, etc, and had a very capable jeep. I would put money saved into lockers and sway bar disconnects and be way ahead.
But that's just me.