My Ur-Q has Eiback springs and Konis. My '86 4000 quattro has H&R springs and Bilsteins. The 4000q is much more compliant and forgiving on rough surfaces. Not sure if that is a good data point for you, or not. Based on my experience, I prefer the Bilsteins. Mike Veglia Motor Sport Visions Photography http://www.motorsportvisions.com