Beethoven' 7th Symphony.
My second favorite fantasy would be to turn everyone on to the beauty and power of all of his works. Without all of the pre-conceived idea's of what many pre-judge the very idea of his music to be.
Having been raised with the likes of Zepplin, ZZ Top, and the rest( which I still like) it's like a breath of fresh air to hear something different.
Hear it all for free http://www.npr.org/templates/story/story.php?storyId=5477647