Unfortunately I can't compare an M3's ride to a Civic's. My 535is (Bilstein) has a completely different ride than my 735 (Boge) and Civic (KYB).

Thanks for the AGX post. Anyone else using either Bilstein HD's or Touring's on their Honda or Acura?
I think the Touring's are in my immediate price range but I don't want to end up with KYB gr-2 quality either.