I have read the extensive exhaust thread and thank everyone for all of the wonderful posts. I have listened to sound clips and reviewed everyone's opinions and have narrowed down to three choices in this order: 1) MAP catback for the awesome deep tone 2) Borla catback due to it's wonderful tone and burbles and 3) the Cobb catback. All three are very similar. The Borla surprises me as it has a resonator whereas the other two do not which, leads me to the "drone" question. I assume the resonated exhaust attenuates the drone better and makes cruising more tolerable. The MAP has the deepest tone out of anything I have heard in comparison. What is everyone else's experience with these 3 choices? All are very good choices and I feel the drone issue is the deciding factor.