I installed the Bilstein 5150's last September and absolutely love them. Unfortunately though, I had a seal on the rear passenger side blow so im going to have to replace it. I'm not exactly sure why or how it blew but I don't think it had anything to do with a defect in the shock. I do a lot of off roading so that might have caused the problem.
The 10" travel with 255/70 valving works perfect with a 2 inch lift. It does make the ride stiffer which is how I feel all lifted vehicles should ride. That and I have the front Bilstein HD struts which stiffened it up a little too. As for the shocks, the mounting eyelets are a little narrower then the stock shocks. So you have to use a few 1/2 inch washers for them to fit properly. Also I went to the local hardware store and picked up some new bolts that are slightly larger so I wouldnt have the clunk so others have had with the shocks since the eyelet is slightly larger.