Oh no, definately not too bouncy or stiff (these rigs are pretty "phat", almost 6,000 lbs, so I personally think heavys are the only way to go). Trust me, I know, I had an older straight axle Toyota 4x pick up with a super stiff suspension lift back in the day, so believe me, I had big concerns about having another rough, kindney belt, stiff suspension lift. My dakar experience is not even close to being stiff and nasty. Very good ride!
I don't really remember everything that came, but basically what you listed sounds about right. I have the greaseable bushing, but who knows, in theory I guess having the ability to lube would mean easier/ less friction, so a smoother ride I guess. But are they really that much better? I don't have the experience to tell you one way or the other, IMO it can't be THAT much of a difference, but I don't know to really say. My longer shackles are from Downey Off Road. Not anti-inversion which would be nice, but for my needs (family outting rig) not a super necessity. My set-up was put together by David Dearborn (Urban LandCruisers) but I have also dealt with Kurt (Cruiseroutfitters). Both are really knowledgeable and good guys. Although it sounds like RR is helping you out pretty good too. Pretty easy install really, one of the easier project I've done. Me and Toy350 did the install on a Saturday/night and went pretty smooth. I recommend 4 burly jack stands, and at least 2 floor jacks to help. Start spraying some kind of bolt lube/ brake on all the nuts and bolts now and keep doing it up to the day of the install. It will make those bolts come off a bit easier. You might also get a hold of the two guys I listed here and see what they got going too. It's always better to have more info than just some info. Well, at least most of the time anyway. Good luck.