I can tell you that I was very satisfied with the RR lift when I had it. I had great cust service from RR and they replaced the poly spacers w the newly designed metal ones free of charge. I also purchased the rear shocks but not sure if they are really needed. You can always disconned sway bars the old fashioned way - unbolt em - if you want increased articulation. I cannot comment on the RC lift, but lots of folks happy w them too.

As for tires I was running 265/70/17's. At first w/ no spacers and the front tire would rub at full lock on the inside frame. I then decided to get spacers and rubbed at the pinch weld. It's definitely livable, but I eventually went with the superlift for various reasons but nothing to do with the RR.

One thing I noticed about the RR lift is that the front spacers did not have tabs to hold the bolts in place - maybe they have changed that I don't know, but it was a little difficult to get a wrench up in there to tighten them down. Not sure what the RC has.

Anyway - that's a start on feedback.