XM or Sirius


I want satellite radio, but which sounds better? The more I read, the more it seems 50/50, yet some are so convinced. I wish Sirius had an analog digital out unit like the Polk, so I can run the signal through a dac. And I do like the idea of $500 lifetime with Sirius. Please advise.
ulph
I love Wikipedia. I often go there intent on doing a specific search and end up spending hours getting sidetracked and branching off into completely unrelated topics. A great place to get a primer on something before investigating it further.
Has anyone tried the new Directed/ Polk Audio SIRIUS tuner (SRH-1000)? Ive got the older SRH-500 and wonder if it's worth upgrading.
Both are glutinous examples of aural wallpaper sorry to mix metaphors). Give your central nervous system a break and give your brian something to do - try "Books on Tape" (CD, iPod). Your local library probably has hundreds of them.