There are a lot of people that will bag on the RC kit but it's not that bad. I've got the RC X-Series kit (4") and I think I'm doing fine. Still balancing out some of the bumpsteer (or slight DW whatever you call it) but otherwise it's ok. The ride's not "like a Cadillac" but I expected that.. I would've bought a Caddy if I wanted to ride down the road that way.
Even though most manufacturers don't warn you about it, DW can happen easily on any kit (including a LA kit) and it's typically caused by worn suspension parts. You'll want to factor in also replacing all TRE's, Axle Bushings, Ball Joints, maybe hubs and a few other odds and ends too. For me, it was a good choice. Is it top of the line, no. Do I need top of the line? No.
With any kit I'd recommend getting a WD hitch if you're planning on towing with it. That'll help level out your ride (and the trailer) and make it easier on everything (rear end, suspension, transmission, etc).