Getting the biggest bang for downloading free music from the Library

I love long pieces of music – music where I can be taken somewhere; music that demands to be experienced, not just to be played in the background. Opera? Yep. Symphonies? Definitely. Progressive Rock, Jazz, experimental anything – I'm ready and waiting. When I heard that the library now subscribes to Freegal (an online database that provides access to songs from Sony Music's catalog of artists) I figured I'd give it a spin. You only get three downloads a week, so how much music could I get with ...