James I used to experience a kind of oscillation when travelling down certain roads with a bumpy surface like the M20 in Kent. The nose would bounce with the Bilsteins. Fitted the Nitrons and problem solved. They just felt better as a damper. Now I know this is a complex subject and also it is hard to find a damper that will be good on road and track but I was relatively happy with my old Nitrons for road and track use. Seen many car reviews that slate the ride being too harsh or too soft and these cars have millions of pounds spent on development and they still do not please everyone. The original poster can ask a question and get hundreds of opinions but ultimately it's his car and he can decide what he wants to spend his money on. I am sure that the Bilsteins like any damper is built to a price, spending a bit more I would assume would get better quality, not always but hopefully and that quality adds up to good consistency in performance. Whether most owners can distinguish that difference is always debatable. Most of us, me included have cars with far more power and capability than we can master but does it really matter? N