It's interesting how GM would put every option known to man in the cars and then just not put a fancier option in when its already got bells and whistles. I understand that sometimes its a dealer installed item so they can sell the car higher. I wished I had the 6-disc monsoon system. I am glad I have Xm Radio built in. I drove two other cars for a very long time with extra equipment always around. I like stream lines and orignal looking equipment. =)