XM RADIO receivers/opinions??? Pls Help!

[tekchic]

I'm looking to get my husband an XM receiver and subscription for service for his car. He has a REALLY nice in-dash CD player/radio already so I don't want to replace that. I guess I'm looking more for the add-on receivers.

I'd like to hear from anyone with an opinion on the receivers or the service or any special deals you've come across.

Thanks for your help!!