You don't want Rough Country. Their 3.5" lift comes with 4 new control arms, which are completely unnecessary at 3-4", and doesn't come with new longer or adjustable track bars, which are absolutely 100% necessary.
I highly reccommend this kit from Iron Rock Offroad, so you aren't paying for things you don't need. Add a rear track bar and you're all set. I also ended up using some 3/4" spring spacers in the rear to help level it out, as your stock V8 front coils moved to the rear might not give exactly the same 3.5-4 inches of lift as the new front coils that come with the IRO kit.
(IRON ROCK OFF ROAD: ZJ 3.5" Benchmark Series Lift Kit