I can't listen to regular radio after having Sirius and the thing that sucks about an iPod is that there is no variety/surprise. Its all music you put there.
I have one Sirius/XM radio account and a separate tuner. I just have cradles wired into the receivers and move the Sirius tuner to whatever I'm driving (listen to it 90% in work truck). My work truck is noisy, my Jeep is noisy, if I can just hear Opie & Anthony, Boneyard and Liquid Metal, I'm happy. I originally subscribed for Stern, but can't stand him anymore.