After lots of searching and comparing we had the Kelderman system installed front and rear along with stiffer sway bars. We stopped in the Kelderman factory in Iowa on a trip and had them look at what settings we were using. They made time for us the next morning and replaced the front shocks with "softer" Monroe's and set the air pressure front and rear and tire pressure. The ride has been perfect since.
The Kelderman people were the nicest group overall we had ever done business with. Since they design and make all their own parts on site they know what they are talking about. They didn't try to sell us the fancy extras and they discussed the pros and cons of them openly. They said the only thing we needed were the front shocks, and anything else would just be feel good parts.
They have a couple of pads you can stay at their place while they do any work and there is a nice little state park less than 1 mile from them.
Can't wait for the weather to improve so we can get on the road again.
But that's just my comfortable riding opinion FWIW. ;-)
Ski