My 6 is being looked at because the Sport AT sticks in manual mode. The dealer gave me a base 6 as a lender til its fixed. My car has the Bose upgrade and the base model does not. Here is what I realized. My Bose system sounds pretty good but I really miss not being able to adjust the midrange sound which I think is set too high. However, the base model does have midrange adustment in addition to bass and treble. Go figure.