Exhaust: I have the race exhaust - loud and satisfying for most people. However when compared to based exhaust the difference isn't drastic. Another owner with base can barely tell the difference in my car except the frequency was fuller and maybe 15 percent louder.
I have heard the fabspeed system that setup is much louder.
Suspension:I don't have the mag suspension and have not ridden in one with the mag suspension, but without the mag ride is pretty harsh on imperfect roads.
Brakes: carbon ceramic is great, also eliminates brake dust which I think is a huge plus.
Sound system: I have the base system and it is pretty good. I cant say my burmester system in the 911 is that much better. It does have Bluetooth and should be able to hear Pandora via Bluetooth.
Hope this helps.