I purchased the AVIC-N1 because I could keep using XM, but I now have a question? Is there a way to keep the XM tuner from my BOSE and use it with my AVIC-N1 or do I need to purchase a new XM tuner from Pioneer? Also, is it possible to get SIRIUS with my AVIC-N1 or am I always going to be stuck using XM in the future?