Speaking of that, jsouth..... And to answer your questions, zback...
I had the 2.5" RC kit on my truck for about 15k miles. No issues and the lift was exactly what I wanted. Over time though, the ride got rougher. Pretty damn jarring over a good bump or RR tracks (I'm sure the stock Wrangler SR-As don't help either as they are garbage). Did a little research and thought I'd save a little $$$ by just replacing my rear shocks with the Bilstein 5100s to help. (I have the rear block form the kit installed as well). I couldn't believe the difference in ride just by changing the rears. Drove to work the next day, got online, and immediately ordered the 5100 front adjustables. I just put them on, on the highest setting, last weekend. Basically removed the front lower strut spacer and left the 3/8" upper spacer from the RC kit on top of the Bilsteins. Gave me right at 2.6". The ride is incredible... Feels like a Cadillac. Very responsive and smooth, yet stiff and soaks up the bumps so nicely. If that makes sense. Here's a few pics of how they look. Tires this weekend!