I had a separate add on sirius for my old xterra, but I didn't like the way it looked and I got engine whine through the speakers. For my Fronty I spent a few extra bucks and upgraded the stereo with a new deck and a separate sirius tuner module that connects up and hides behind the stereo in the dash. The extra money was worth it to me for the better performance and the clean look. IMO the add on looks like crap no matter how you do it.