the upgraded factory sound system is among the best i have ever heard. for $640 MSRP you get the media center 430 from the factory, which includes a 30 gig hard drive for storing music. for $1,295 MSRP you get a power express sunroof, 9 Boston Acoustic speakers w/subwoofer, 2 articulating liftgate speakers, and SIRIUS Satellite Radio. for an additional $375 MSRP you can have the U-Connect voice command with bluetooth. with as tempermental as these cars are now with the electronics, i wouldn't want to be diving too deep into them with aftermarket equipment. i got all this on mine, with the exception of the U-connect, which i added later. by adding the U-connect, you lose the two buttons on the steering wheel and you must use the buttons on the face of the radio.