Thanks for the link, it is a great site, I will order it from them.
I entered the European avant-garde music when I was still at a student at the university - first time listening to the water flow in a Xenakis LP at a colleague's house was an unique experience for some one who considered that music had stopped at Bartók. Since then, from time to time I carefully shut my door and listen to some pieces of Musique Concrète, although I am just a an amateur, not a specialist as you. Or, when I am sick of listening to drum test recordings, I fascinate friends with the Pleiades!