Learning of more amazing composers!

I've been finding out about some truly amazing composers whom I have never heard of until now!  After my advanced aural skills class on Monday, I talked to the professor Dr. Boss (a genius of atonality and twelve-tone style music, and a scholar of the composer Arnold Schoenberg) about my excitement towards learning how to sight-sing atonal music (which we'll be doing in two weeks), and I told him about how much I really like Schoenberg's tonal music, before he began his atonal phase.  This is an example of what I mean by his phase BEFORE atonality:

[Note:  for those who don't know, atonal music is music that is not in any key - not even temporarily.  To most people atonal music sounds like a bunch of random notes, but there is a mathematical construct behind it].  Here's an example of his atonal music:
http://www.youtube.com/watch?v=xrjg3jzP2uI

Well, Dr. Boss told me about Schoenberg's best friend, a composer by the name of Alexander von Zemlinsky.  Schoenberg's first wife was actually Zemlinsky's sister.  Anyhow, I listened to Zemlinsky's music on YouTube, and found this gem:

Then today I was randomly searching through YouTube, and found a composer I have never heard of before by the name of Kurt Magnus Atterberg.  I'm amazed by how wonderful this piece of music is:

                         

It's amazing how much incredible music is out there, without even being noticed.  I'm grateful to the people on YouTube who have posted such iconic music.  As a composer, it gives me new ideas about how to capture certain feelings with music, while keeping the motives and the context interrelated.