I've got RC 4" lift with bilstien 5100s and couldn't be happier. When I got the jeep it had the RC shocks and when I installed the 5100s it was night and day. That being said, I've been fixing the mistakes the PO made with the lift and the RC springs are soon going to be replaced as well, they ride good enough for now, I've prioritized my funds on other important upgrades first (SYE, Novak shifter, control arms, track bars, steering, brakes etc) if you have the funds I'd spend the money on better coils off the bat, do it right the first time so you only spend the money once.