I just got an XM radio about two week's ago. I think it's the best thing since sliced bread.
I spend so much time in a vehicle and "was" constantly searching for radio stations. I highly recommend XM.
No static, 101 channels (so far) a lot of news, talk, comedy and of course all the music you could ask for. If you spend a large amount of time driving, you can't go wrong.
You also can just "snap" it out of the cradle put it in another car or bring it home and hook it up to your home system (in just a couple of seconds). I've already got 5 more guy's at work to buy one. Wish I had some stock in them as I believe it's the next big craze since cell phones. I got the Delphi model (Sony makes them also) cost about $185.00 with one car cradle, $9.99 a month subscription fee. CNN, FOX CNBC, are on 24/7. I got it mostly for talk radio and news but the 3 comedy channels are good too. Edit: For you sports and nascar fans they have something for you.
http://www.xmradio.com/
check it out.
swamp