The Doestec's I have on the front of my current truck are too soft and bottom quickly, I put Rancho 9000's on the rear and they work fine. I also ran 9000's on my 4Runner and could run parts of the race track in Stoddard Wells at 70 mph without bottoming the IFS to hard. Had Rancho 5000's in my 84 truck and they were tanks, but they were strong. I would say they matter and would go with an adustable since you can play with the settings until you like the feel.
