We have a 2007 Tribeca Limited (non-navigation) and we are thinking about having the oem factory satellite radio kit installed. Do any of you have experience with the factory satellite radio kit? Is it any good? The dealer wants something like $600 plus to have it installed. We can have an aftermarket unit installed for about $300, but that would require having an external receiver mounted on the dash and we could only use the steering wheel buttons to control sound. We would have to reach over to the external unit every time we wanted to change the station, which is why we are considering the official oem factory kit. Your thoughts???