] So why would people pay for radio, when they have a free
] alternative?
]
] Because satellite radio is fantastic - a cultural source
] unlike any other. It's so addictive, the Sirius manual
] actually refers to its customers as "users."

I don't like to recommend articles from the nytimes because of the subscription but this one I made an exception. I love my XM radio and for anyone that has to spend more than 3 hours in a vehicle a day, it is wonderful. This didn't give any technical insite into the two services but gave a quick look at the programming of Sirius and XM.

State of the Art: Satellite Radio Extends Its Orbit