I also highly recommend the Varsity Network App on your phone (it's free). I live up in Cleveland and will listen to Marty and Rob, if I can't make it to a game and am in the car. Also can listen to the coach's show out of market.
If not on Sirus, that is what I use as well. My one car is all Apple or Google so no Sirus, however my weekend car with $275k has Sirus so I can listen to games on Saturday afternoon