I had a hard time making the decision. I realized that Sirius had some problems and may or may not make it in the Satellite marketplace.
#1 reason I chose Sirius was their programing offered more of what I like to listen to and I can't even explain my crazy tastes it changes from one day to the next but they had it all covered including channels like Court TV and Discovery.
#2 They have no comercials on their music channels this was very important to me and if I'm not mistaking XM now offers the same.
#3 They support Offshore racing.
Fever Mike tried to compare the audio compression of Sirius Talk stations to the quality of AM and yes he got jumped on big time (and that was wrong). But he was wrong the sound quality of the talk stations is better than most FM tuners. I realize they do compress and why they compress but it just is not that big of a deal to even warrant an argument or discussion.
I hope we will all have the choices to make for some time it will keep the prices down and keep our music comercial free.
In NO way am I saying Sirius is better than XM I am saying it was a better choice for me and BTW both systems offer plug and play tuners so you can take them with you to multiple vehicles or even in a boom box. This equipment is dirt cheap I think I have less than $200.00 involved in the Truck and boat plus I prepay one year to keep the subscription price the same so if I need or want to change over its no big deal.
So with that said go to their websites and check out the programing and deals and see what fits you. I think either choice is better than being stuck with regular radio and the endless comercials and static.