I'd just go BDS or Old Man Emu and enjoy the superior ride and flex.
I'm ordering one of them for next summer.
old man emu (arb) does not have anything over 2.5'' of lift
BDS has 3.5 and 4.5, the 3.5 is $1000 vs $450 for the 4'' RC kit and contains the same items.
looked at others as well, so here's the list with the minimum of 3.5'' of lift
RC 4'' - $450
BDS 3.5'' - $1000
BDS - 4.5'' - $1400
black diamond 3.5'' - $670 (no pitman arm so that's another $50 let's say)
superlift 3.5'' - $500 (no shocks and no pitman arm, another $250)
fabtech 3.5'' - $900
RE 4'' - $820 (no pitman arm, +$50, also no bump stops)
skyjacker 4'' - $820 (no pitman arm, +$50)
Warrior Products 4'' - $690
Rugged Ridge 4'' - $970 (no pitman arm, +$50)