It's a sham what they charge for the "upgraded" systems in these cars. Ours had the SG II option which is the Boston Acoustics system with a total of seven speakers including a 8" sub in the rear deck. Wow, what a joke. Fortunately for us the car already had this option as the car was just sitting on the lot, had we ordered the car and actually paid this "option" I would still be pissed a year later.
As it turned out we were able to get quite a bit off sticker so to me it didn't matter, the only thing I wanted was the 730n head unit as I wanted NAV and the largest hard drive. Anyway, I have since replaced all the speakers with Kicker brand speakers and installed the Mopar/Kicker trunk mounted sub that has it's own 200w amp, it's not cheap but it fits nicely and it sound AWESOME! Kicker brand speakers are fairly inexpensive and sound AMAZING!