Rubicon Express's 5.5" springs are well known to give more like 6 to 6.5" of additional ride height. I installed RE 4.5" springs on my previous TJ and they gave roughly 5.5" of lift height (plus my 1" body lift) and even that was excessive for my 35" tires. Why the extra tall springs in the rear? What size tires are you running?
Rancho's RS9000xl is an excellent shock, I'd run that before I'd go with the Bilstein 5100 which I personally find too stiff/jittery. A well known Jeep builder (mrblaine) gave a humorous opinion on them..... install Bilstein 5100 shocks if you want to know if the quarter you rolled over was heads or tails.
I've had 8-10 different shocks on my two TJs and three favorites stood out... Rancho RS9000 (their previous model), Old Man Emu Nitrocharger, and currently Rancho's new RS5000x. The OMEs were absolutely superb & when they finally went bad after a lot of hard use, Rancho hooked me up with their new RS5000x and I was not prepared to like them as much as I do. They're so good I don't miss my previous OMEs at all, I have yet to see anyone who bought them who didn't like them. Good ride on the highway but better yet, they handle extremely (!) rough rocky trails with aplomb and don't beat me up with a rough ride in the process.
Personally, I'd be between the Rancho RS9000xl, Old Man Emu Nitrocharger, and Rancho RS5000x, all of which are gas-charged. Don't confuse the good riding/handling newer gas-charged RS5000x with the older hydraulic RS5000 which would be a terrible and too stiff of a choice for a Wrangler.
