New Leaf Springs advise?

So years of hauling my 20' camper trailer and the usually overloaded 14' stock trailer, I have decide to replace the leaf spring packs on my 06DC/OR short box. They are really sagging when I put any sort of weight on them. My plan is to replace the OEM spring packs(with aal), with a set of All Pro expeditions. That should give me the equal amount of lift as the aals with a much better capacity. Will my back regret this decision the 80% of the time I am highway driving empty? Does anybody recommend something else to save me a few bucks? All Pros are on sale right now for 20% off which puts them at $308 bucks for a set.

 

Air bag system.

 

If you can get a set of rear springs with overload assemblies it would be ideal...