has anyone tried satellite radio? which do you prefer, XM or Sirrius? I am so tired of the DJ chatter, and sometimes I would like to listen to some tunes that aren't on my CD's. Unfortunately, I see lots of hidden start up costs and the monthly advertised fee doesn't include taxes. In addition, what percentage of the stations on either system are comercial free? I'm not going to pay for monthly radio service, only to find out only a small percentage are commercial free. Trust me, the way my luck goes, none of the commercial free stations would be the ones I want to listen to... .