I drove on the RC Series II lift without the shock upgrade and hated it for 4 months. I pulled the crappy RC shocks and threw Bilsteins in an it was a little better. But I didn't notice a real difference until I put my Rokmen control arms in. Rides far more like a full size truck than a short wheelbase Jeep now, IMO.
I have replaced everything from the RC kit so far besides the springs, which is going to happen shortly.
Sent from outer space
Sold: 2000 TJ - D44/D30 with 4.88s, Advance Adapters SYE, Tom Woods CV, Vanco Big Brake kit, 35x12.50 BFG KM2s, ProComp Series 51s, Rough Country 4" Series II, Bilstein 5100 Shocks, Currie HD Steering, Rokmen Adjustable Control Arms, ProComp Adjustable Trackbar, Currie Anti-Rock, MetalCloak Front Bumper and Stinger, Warn rear bumper/tire carrier