I recently installed the Rancho RS9000XL shocks (2/11) to replace the pro-comp 9000's that I was running. I purchased the RS9000XL because of their adjustability feature. I carry a 8'11" slide in camper some of the time and wanted the biggest dia shock (piston size) I could fit on the truck for as much damping control as I could get but yet had the option to soften up the ride when I wasn't carrying the camper. The decision was made easier because I caught the shocks on sale and a Rancho promotion gave me the remote control unit for free. Just back from a 6000 mile road trip and liked the bounce control that the new shocks gave over the pro-comp that I had before. RS9000XL also have lifetime warranty (as do many other manufacturers). With my somewhat limited use (all on the highway), I am happy with these shocks so far. I also use this truck off road so I have yet to see how they perform there but I have no reason to doubt them. Hunting season this fall will be the test for off-road use.