I ran the 4.5" system. the aal wasn't up to par, so i built my own pack, the coils are stiff, but I have a homebrew winch bumper and ramsey 9000(about 150lbs) and they feel about right now. I run no sway bars front or rear and this lift doesn't dip out all crazy.Even with the RE upper and lower control arms with flex joints. If I had to do it again and cheap I would go this rout:
RC Front coils, Rear bastard pack w/ 2" shackle, RE control arms(up,&down), RE Adjustable track bar, Tj stock brake lines, with rancho 5000's. (this is what I now run, rides great when loaded front flexes very well, rear springs needs to be rebuilt due to rust, but perform well with no saging after about 30,000 miles).
AS good as a full RC system if not better, and about 100-200 Dollars cheaper if you are willing to shop around. The RC set up would fall into an all purpose system, rocks, sand, mud, medium speed whoops and rough roads are all in this kits ability. Just my opinion, but... isn't that what you wanted? Jim