A good friend of mine had been building jeeps for years, and he suggested the Rubicon Express kit. They had the softest/smoothest springs at the time that I was doing my lift. I went with it and have been happy for the last 3 years with it. No sagging or bending and I've wheeled it on some good trails in these years. When it comes to quality suspension, I believe in the old saying "You get what you pay for..." I keep my autos for years, and was impressed by the quality of the kit I got. It all boils down to what you are comfortable with buying and research. I had the advantage of my friend, at his shop, to sample 4 different kits with leaf springs and get to set them out and see how well they flexed...the RE springs flexed the nicest and softest. The others, at that time, were Sky Jacker, Black Diamond (only because I liked the kit from them that I had on my 1972 CJ5), and Pro Comp. RE was the nicest, not the cheapest, but this is just what I have experienced with my mechanic friend and went with.