Save your money and look at BDS, OME or Rubicon Express. You get what you pay for in a lift kit no matter what height and the RC is rough in a YJ and have from time to time had some issues. I bought my RC lift through Morris 4X4 and they handled my warranty issues right away no questions asked just sent pics of a sagging leaf spring. New one on the doorstep 3 days later.
The ride quality and long lasting arched springs is what you are looking for. And yes I know how much a good kit costs and you really only want to do this mod once.
89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.
AF Jeep Club Tail #184