I'm DBB and I'm a new owner of a 2005 Cadillac STS V6 with 55K miles. My car came equipped with the Bose radio and 6 disc changer. I've already gained some valuable knowledge from browsing through the different forums. I welcome any tips and tricks to making my STS perform to it's best capabilities. The first thing I want to tackle is modernizing the entertainment system with Nav, bluetooth/IPhone, and satellite radio. So I'm asking for advice on where to start. I hope to contribute to the forum to my best abilities.