I think just about everyone thinks about replacing ESA with standard shocks when it is time to shell out the big bucks for a new set. IMO, you have to have a way to adjust preload. Maybe you are referring to a remote pre-load adjuster??? I know HyperPro shocks have the remotes as an option on most of their shocks and I would sure have it, at least on the rear. This is more guesswork than actual facts. Personally I would go for HyperPro's or Wilbers rebuildable ESA replacements. I love to adjust my ESA on the fly and at least with the Wilbers you don't have to sell the house to buy them.
Old, but not Dead