Rubicons do not like 5 inch lifts because of the really short driveline they have due to the roctrac t-case.
For a 33" tire no more then 2 inch of suspension, and 1 inch of body is required. For 35's, 3" of suspension, and 1 inch of body lift is sufficient.
I do not recommend purchasing off the shelf longarms. Specially RE.
The only shelf longarm I would remotely come close to endorsing would be clayton mfg, and even then there are things I dont like.
With a reasonable amount of lift, quality components, and similar dollars to a bolt in longarm, you can have a short armed TJ that will signifiacntly out perform a bolt on long armed TJ both on road and off.
In no particular order I would not recommend Rough country, RCD, Skyjacker, Fabtec, Rubicon express, procomp, tnt, or superlift.
In short, the only store bought suspensions I would recommend or be willing to install for people are Genrite, Poly performance, Currie, and Clayton.
If you can be well informed before building, you'll be considerably more satisfied with where your money goes.