You should try Opeth - Deliverance (the song) because of its weird similarity to Beethoven's 5th symphony first moment, in that it starts out with a really really barbaric simple motife and develops exponentially into a really beautiful piece that wouldn't have been obvious at all from the beginning of the song. If your prof gets bored skip to around 8:50 in the song were theres an amazing change into the clean part. If he isnt impressed by THAT i dunno what will work... good luck man.