How does the Harmon Kardon system sound compared to the stock system, and how does the Harmon Kardon sound (bass, treble, balance, etc.). Also how much room is there in the trunk with top up and top down. Is there room enought for 2 golf bags plus a little extra room. One last question, i am trying to decide between the 2.3 and 2.8, is the bigger engine worth the price difference.
Future Z3 Owner