I need help in choosing a suspension (shocks & springs) update for my 96 Z3. Z3 is Downing Atlanta supercharged, Turner lightweight flywheel, B&M short shift kit, and Dinan exhaust. I don't track the car, I occasionally autocross, and I drive spiritedly. Is the dated suspension on the 96 Z3 worth upgrading or should I save my money for the tii?