Spotify blows away SiriusXM in terms of selection, sound quality and integration within the Tesla software. I was also being stubborn when I first got my Y and wouldn't sign up for Spotify Premium. I was using the free Slacker streaming on the Tesla and has found several stations that I liked. However, I realized that Slacker plays a lot of the same songs over and over. Since switching to Spotify Premium and getting my artists, playlists, podcasts and other favorites programmed, the music options are pretty overwhelming. The only thing I miss from SiriusXM is the Howard Stern Show, but other than that, Spotify blows it away.