You should also look into joining the BMW CCA called the Roadrunners. I sit on the board, and we do lots of fun things including a car show and some great drives.
I think you and your wife would love the Eisenmann Sport. It's not super loud, but loud enough. I actually had a guy follow me off the 60 to tell me how great the car looked and sounded. He then turned around and got back on!
Just PM me if you have questions about the Roadrunners or want to hear the exhaust.