The Maderna is a sweet disc. I have the first issue, from 1980. I was very pleased when DG decided to reissue this. (Now all my friend's have that reissue. I mean it. All of them. They had a simple choice. Buy the cd or cease being my friends. So all of my remaining friends, both of them, have this.)

There's another thread called "most underrated..." that ChamberNut just started. Maderna would be a good choice for that, as his work covered both acoustic and electroacoustic music, and is consistently good, and his conducting of Mahler's symphonies is very interesting.