D. Showan,
There was a recent post somewhere around here about rancho's versus bilsteins. My interpretation of the post is that both are better than stock. Both provide nice compression dampening. The bilsteins provide better rebound dampening ( less springy return in the upwards direction ).
EDIT - I see the toolman posted while I typed this. It would appear from his post that Edelbrocks dont have much rebound dampening either.
Why did I mention this? Well I have had the rancho's for over a year now. I recently added AirLift air bags. I believe that when you go over bumps and those bags compress, the compressed air in there tends to want to push things back up much faster. So things get a little bouncy, at least for my liking. Even at low air pressure. So I set the ranchos so I get the rebound dampening I like, but now are a little stiff on the compression side. Make the compression side nice, and the rebound side does not compensate enough for the airbags. Now that I have the airbags I wish I have shocks that gave better rebound dampening.
So how often do you haul around that camper? How much money are you willing to spend?
My current thinking now that I have Rancho's and air bags is:
-- Bilsteins or Edelbrocks if you dont tow or haul a camper, for the best empty ride
-- Ranchos of you tow or haul a camper and cant afford airbags. Better than stock ride, gives up a tiny bit for the nice adjustabilty.
-- Bilsteins if you tow/haul and can afford airbags too. Use the airbags to gain the extra support while towing and hauling and buy shocks for the best empty ride, especially with airbags.
Of course I have not got to try this theory yet. This assumes that the airbags can compensate for the added weight and you dont need the shock adjustment anymore. I plan on a test the next time I tow over a large distance. I will go for a distance with the ranchos set on level 2 as empty, and a distance on level 4 where generally tow. Maybe I can figure out if the adjustability of the shocks is needed now that I can adjust the air too.