If I do get Sirius, it WILL be for the sole reason Howard is on there. I had a rental car for a couple days a while back, and while I did like the music, I did start hearing a lot of repeats the next day on the hair metal station, for instance (I'm almost certain they've got a Scorpions song playing once an hour). So of course the wide variety of music will be great when I'm in the mood, I think I could live without it. I did like the traffic channel that had continuous updates for Dallas and Houston.
The one thing that scares me is it would cut out if I was in a parking garage for too long, or under a car port or something. That could get very annoying, so I'm still debating. On the positive, I'm glad I'd be able to listen inside my home over the internet without having to bother installing a home unit.
But Stern totally has me hooked after the short time he's been in Houston.