I'm going with the RC 3.5 inch kit like Kurkku is. The deciding factor between the IRO one and the RC one was the control arms. I didn't want to keep my factory arms. As for track bars, it comes with a rear drop bracket, and the front one I'm going to make custom probably. Either kit is really good though. I've heard great things about them both. Its up to you.
Trail TESTED, not Trail RATED
'97 ZJ 4.0|3.5 RC F>R|31" Hankook Dynapro M/t|1.5" wheel spacers
Build thread: http://www.jeepforum.com/forum/f197/my-jeep-build-d-1239689/