My last year of college I discovered Henze by accident. I was diggin through music to play for my senior recital when i found a Marimba solo written by him(Scenes from a Snow Country). It was very, very twentieth century - it used the tone row, lacked bars lines, and was incredibly impressionistic in it's style. Well, since then I have bought some stuff by him - my favorite has been his Requiem. As you mentioned, it really hasn't stuck with me so much - but all the same I like listening to it for the experimentation of tone color - the different techniques - and you know, some of it just sounds neat. Jeremy