Update: I changed out the M3 Bilstein B6 rear shocks for the shorter Z3 M coupe rear shocks. Now the rear wheels have less droop when the car is jacked up.
Lastly, I had the straight pipes which replaced the cats removed, now I have a cowley freeflow silencer in their place and the exhaust has lost all its pops and crackles and sounds rather stock...Going to miss that.