I would be very interested to hear your thoughts on the audio quality of the basic vs the ungraded option. I would hope in a car of this quality that the audio would be comperable. I spend a fair amount of time driving and the audio quality is very important to me. I had a Hyundai Genesis with the Lexicon 17 speaker system that was phenomenal. Any audiophiles out there who can evaluate the quality of the 7.1 sound in the S compared to other high end systems found in Jags (B&W), Acuras (ELS) or Lexus (Mark Levinson)?