There are many news reports today indicating that Sirius and XM might be merging to form a single satellite radio company. In my previous car I had access to Sirius and in my new TL, I have access to XM so I’ve had a chance to listen to both of them.
In my opinion, the sound quality of Sirius was audibly superior to XM. The channel lineup and the music also was much better on Sirius. Additionally, being a football fan, I really enjoyed the exclusive access to NFL.
Now, with the possible merger, I could get access to the NFL again, and perhaps much better music. However, as my car only has the XM receiver, I think I would get the inferior sound quality unless Acura came up with some sort of a replacement to handle the better fidelity of Sirius.
Seeing as the merger hasn’t been official approved yet, I might just be getting way ahead of myself. But can’t blame me for imagining. 
Cheers