hey guys I have 2 questions about the 2005 645ci stereo system. 1. does the cd player and 6 cd changer play DVD music and CDR-CDRW cd's?? I have alot of mp3 and wma music on those media types and I'm curious. 2. how is the premium sound upgrade system sound? From what I understand, it's a Logic7 13 speaker systems, around 315 watts. I read a couple of reviews and they say the sound stage quality is great, wanted to know if anyone here has actually heard it before. The 2 subwoofers that come with the car, are they 8" or 10" subs? thanks for any feedback..