My business partner just went through this.  His deciding factor was
equipment.  He really liked the MyFi unit offered by XM.  It was far more
versatile than anything Sirius offered.  Other than that, he said it was
pretty much a coin flip.

Cheers,

Jeff

----- Original Message -----

> What features are most important to you XM ans SIRIUS owners--which do you
> prefer and why?