I posted this recently under another topic, but my wife says I repeat myself.
I am an XM fanatic, too. I just installed a Roady 2 on my R. I took pictures but smug mug was not working the day I went to upload them.
I was going to get a bracket and extra antenna to take my car unit and transfer it to the bike. But the Roady 2 is now < $40, including all brackets, antenna, etc., so I just bought another Roady 2 from myradiostore.com. I use the Hoon Hardware bracket to mount it
http://www.hoonhardware.com/RoadyHolder ... dyalts.htm
I already had the RAM handlebar mount from something else, so I only needed to buy the Hoon Hardware Roady holder. You could also put it on the clutch reservoir cover.
I bought a cigarette lighter socket from Radio Shack that I spliced into a switched power source. I use the Roady's cigarette lighter plug because it has the 12v to 6v transformer built into the plug. I plugged that into the Radio Shack socket, duct taped them together, and placed it near the battery. I could have used one of those fancy little 12v to 6v converters, but I like my solution better. The new generation Roady XT uses 5 volts, for example, so I have more flexibility with my approach for future upgrades.
I also bought an in-line volume control at Radio Shack for $6 or $7. It dangles from the Roady. I put the ear buds on, put the helmet on, plug in and I am ready to go.
For a total of about $85 I now have a cool satellite radio set up on my bike. That price includes the Zip Loc bag I carry around in case it rains.
I have been doing more interstate commuting lately because of a new job. I love having XM for that.
On the back roads, I like just the noise of the engine.
P.S. I recommend Etymotic Research ER6i Isolator Earphones. They are now available for $85 from Amazon w/ free shipping.