For those with the 540i sport are you happy with the factory shocks? I have a 97 540ia non sport (48,000 miles) and am getting 18" wheels, Michelin Pilots and Eibach pro springs installed next week. Am wondering if I should replace shocks while I'm having the springs done. However, some of the posts I've read on Konis and Bilsteins concern me, as I want to maintain a good ride quality. So, I'm thinking of just getting some stock 540i sport shocks from Pacific BMW. What do you guys think?