I had Bilsteins on the front of my E450, and found the digressive valving too floaty as I'm lightly loaded with a no-slide 24' house. The front tires were cupping badly. Switched to a pair of Monroe Magnum RV shocks, which were all of something like $25/each using an Advance Auto coupon, and they resulted in a much more controlled ride, and also the tires are wearing evenly as the twin I-beam front end isn't going up and down all the time with it's inherent toe change.