I put the 5100's on my truck just a month or two ago, in prep for a lift in the future, and because I wanted something to stiffen it up a bit. It was a little harsh for a while, but I like stiffer shocks, especially in such a heavy vehicle. Then I changed wheels and tires, and now it rides totally different. It's smooth and soft as can be, but feels stiff enough that it doesnt wander on the road.
I'm hoping that since I'm starting with the Z71 springs, it won't be hard for me to do most of the other stuff, although I may end up keeping the rake for when I haul/tow, so the car doesn't point skyward.
Thanks for the info!