I am inclined to subscribe to a streaming audio. I am testing both Spotify and Rdio and both are great. While I found that Rdio interface may be slightly better, Spotify is the only one to have Led Zeppelin and all Metallica albums and content is more important. One third option could be Deezer. These are basically the three options for me, as I live in Brazil and other services such as Beats are not yet available here, so they are simply out of question, no matter how good they are. So, I would like to know which of these services have better content. A while ago, Spotify and Rdio had each some exclusive artists (http://www.wired.com/2011/12/spotify-vs-rdio/), but I guess all of them are on both services now. The only difference I found so far is that Spotify has Led Zeppelin and Metallica, and Rdio lacks that. Am I missing something? Do you guys know about content available in Rdio that Spotify lacks and vice-versa? And what about Deezer? Thanks.