I wish I could find someone who has run the Rauncho 5000 (or 9000) and swapped to Bilsteins, or vice versa, for an opinion. I've had the Rauncho 5K for 4 or 5 years and like the adjustability, but the expansion joints on the very worn section of concrete freeway around town just pounds my kidneys to mush. They seem to set up a perfect harmonic for my long bed at 55 to 75 mph (posted speed is 65). At 80+ it all smooths out, but Smokey frowns on it.
-Jay