If you don't tow or haul and want the best ride go with the full replacement leafs. I really wanted to go that route but I haul heavy and wasn't willing the spent the money for the long travel air bag setup to make it work. If you want to go full replacement leafs and want to save a little money look at the replacement Deaver leaf packs. They build the Carli leafs and aren't built to the exact same specs, but are similar. They can be found cheaper than the Carli leafs if you do some searching.