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I have Dinan with JRZs on my M5 and Dinan with Konis on our 540iT. I've ridden in 1mpowerme's PSS9-equipped M5, but don't know what settings he used - I presume a standard street setup. The PSS9s ride noticeably harder than the Dinan JRZs or Konis. I didn't have a chance to "play" with his car, but both of mine handle fantastically. If I was doing things over again I don't think I'd do anything differently.