Read my review- this was, by far, the worst investment I've EVER made, and I owned shares in Microsoft! Har har...
Anyway- the springs are garbage, the shocks are garbage- pretty much all they do for the JK is garbage. Save up the extra $ and buy from a GOOD company. Teraflex's 2.5" coil lift is superb on-road, and off. Rough Country's just sags and sucks- there's a reason that NOBODY runs their stuff at any of the big parks (never seen more than a set of their shocks at Rausch Creek, ever).
On the other hand, you're ONE HUNDRED PERCENT CORRECT that a coil spring lift (given decent quality, unlike RC [see a pattern here?
]) will ALWAYS be superior to a spacer lift. But you have to pay to play. I'd even recommend Rancho or Skyjacker over RC, and I'm not overly fond of either's products for Jeeps.
As for tires, what are you looking to do? If you're 99% on-road, like most folks, I HIGHLY recommend the Firestone Destination A/T's- GREAT on-road (help my wife's Jeep get 20+ MPG on the highway), and went almost everywhere I went at Rausch Creek (blue, black trails) with ZERO problems only aired down to 20 PSI! (Pissed me off a bit
). Check them out at Tirerack.com Very not spendy, too, and they're great in snow.
Thank you for serving, happy 4th, and welcome to the forum! Mark W.