Keith,
All carriers offer multi use systems that can be used in all of your vehicles. I have a Clairon Sirius unit with a car kit in the Kick, I had a kit in the X untill I sold it to Digger, a 'home kit' at the office and a home kit I still have not hooked up at home, They now have portable units you can carry around like an MP# player and then hook it into your cars system, home system etc.....
I love mine. I believe that I am going to upgrade to onle of the new portable units so I can use it while making road trips on the Bike. I first bought my Sirius to make the Trip to Moab. I literally drove 1625 miles across the country and only lost reception when I went through the tunnell on top of the pass above Denver and when I pulled under awnings while filling up my gas tank.
Zig