The only shock that reduces road imperfections is supposedly the gold colored Koni-FSD. We have the red colored Koni adjustable shocks set to the Heavy-Duty setting. They work great for handling, but I do wish the ride was softer while straight-up cruising. Over-inflating the tires makes it worse yet.
Like everyone with a motor home, I too would like to further soften our ride without sacrifice to shock-performance and handling. I wish someone here had first-hand experience with
SULASTIC SHACKLES FOR E350/E450 MOTORHOMES for they are very simple and make sense in how they improve the ride. I am concerned the product may sag the rear end and/or increase side-to-side leaning. The pair costs $419 including shipping.