I've got XM and I love it. I was hoping for an XM SIrrus merger, but my hopes are fading.
I wish I had the NFL games, but XM has tons of other sports.
I have the Dog bone shaped Boom Box and it the antenae for it is better than the one for my truck. I have first generation gear so the gear might have improved.
I've had a lot of fun with my kids sharing the rock and roll I grew up with while in the car with them.
Fred, Lucy, Flight 26, Ethel, and Fungus 53 get the most play in my car.