My vehicle has the factory nav w/ backup camera, single cd, and no AUX button. Based on my research so far (from a dealer and multiple car audio shops), my understanding is there is no way to keep the current unit and install sat radio without using an FM modulator, and furthermore that because of the oem window antenna that the sound quality of the sat stations would be relatively poor. Apparently the best aftermarket sat radio sound quality can only be achieved if the sat receiver is hard wired to the head unit, but because my unit lacks an AUX button this is not possible. I'd even be willing, if the above is true, to spend the money on a new stereo/nav/sat unit but I was told that I would lose the oem back-up camera feature. I don't want to risk the investment in the FM mod. set-up if the sound is gonna be lousy anyway, so I sure would appreciate any knowlegeable input!