I have the factory radio/cd/mp3 installed. It is Sirius ready, but uconnect is not available. Has buttons, but I need the module. My question is would it be more cost effective to just install an aftermarket head unit, with Bluetooth and dvd, or should I install mygig? I really like the mygig unit, but don't know much about it. Do I need any additional parts to have gps and Bluetooth? Being that it has a hard drive, I have no need for ipod controls. My Nitro does not have the premium sound system. It does have 6 speakers. Can I add a subwoofer to mygig? I would like to retain some factory look, as I prefer not to use a radio install kit.