PS. Coming from the AVR3311
Sorry, somewhat off-topic, and my opinion only.
I was a Sirius/XM subscriber for years (starting back when XM was part of the DirecTV package), and continuing with my BMW satellite radio. However, with the recent explosion of internet music providers, both free and subscription-based, I think Sirius has fallen behind. If music is your objective, there are many other services that do a better job than Sirius. If you want sports and talk, then Sirius may still be the right choice.
If I were to continue with Sirius (which I didn't), I would certainly opt for the internet delivery, as Chris suggests. And for in-car mobile listening, nothing beats an iPhone, installed in a nice car mount, and connected to the car's premium sound system. Unlimited, on-demand music choice!