I recently bought the infamous Z1 and subscribed to Sirius Sat. radio. I'm
Satisfied with the programing but dissatisfied with the Z1 display. I would have least expected a display of the Categories to choose from. Anyway, reading the difference between XM and Sirius functionality on the Z1, It seems that pioneer favored XM and offered a better display and layout of the channels and category. Can anyone tell me the major difference.