Not to be a contrarian but........
I used to be a Bilstein Fan Boy. Had them on every vehicle from a VW Thing to a 40' diesel pusher motor home. Always satisfied with the improved ride and handling until.....................
I upgraded my 2011 Sprinter to Koni's. WHAT A DISCERNIBLE DIFFERENCE!!!! Huge difference as soon as I left the installer's lot.
For a van that is usually weighed down to the max GVWR, it has made the ride and handling more than superb! I'm definitely a Koni guy now!!