I recently went through this same process and eventually opted for TF based upon specs and word of mouth customer support rep. I opted for a full arm 4" kit w/3" springs w/35s (4" kit gives me the stuff to bump to 37s later on), TF driveshafts and so far a very cool TF Rockguard front bumper. Will definitely go with their rear one, too. TFs' Carl provided great help both here on the Forum and on the phone as I put the system together, and TF's shipping time was unbeatable. Component quality is excellent and the net-net ride & handling is better than stock. It actually factors out at a 4" lift, even with the weight of the bumper & winch.
My only minor gripes were that the instructions could have been a bit more detailed (torque specs., sequencing) and a bit of concern over their brake lines and rear way bar links. However, compared to some of the other mfrs' TJ kits I've put on this one was a breeze.