I just bought an 09 Ultra. I am having my Zumo mount installed before I pick it up. Does it make sense to buy the Harley Xm module to fully integrate it with the radio and intercom or just buy the Zumo module? I guess I could just plug the Zumo to the aux port and be done other than being able to use the cell phone bluetooth option right? Any advantages to Harley's XM module? The other part here is I would love to get the Zumo's cell phone pairing to allow me to answer calls by the intercom but that seems costly from any angle I have found on the net. Phil 09 Ultra Black Pearl, stage 1 download bone stock otherwise, tour pack and saddlebag led brake lights...1 day old to me!