Ennio Morricone - The Demise of Barbara and the Return of Joe
You can download this song here: http://www.megaupload.com/?d=NY6JDZGL
This song is from the Kill Bill Vol. 2 Soundtrack and is probably one of his best works. This song is highly underrated because first I could not find the full song anywhere on youtube, and second, not many people has heard about it since this wasn't a theme song in Kill Bill Vol. 2.