For one thing you can't get XM by subscribing to Sirrus. XM is it's own company and so is Sirrus. You can buy an Alpine XM tuner box (TUAT020XM) and add on the fm modulator (CRA1667RF) to make it work with your stock radio. Kind of defeats the purpose of getting digital satellite radio then running it fm modulated. I'd buy a radio that is XM ready if I were you.
MATT
