Wow, this is a really old thread, if Brahms and Debussey are said to be "modern".
Along the top shelf of my cd collection are discs with works by Bartok, Beethoven, Brouwer, Copland, Ginastera, Lou Harrison, Mussorgsky, Orff, Pärt, Prætorius, Sanz, Sor, D. Scarlatti (lots of Scarlatti!), and Sibelius, along with collections from Peter Blanchette, Piffaro, Atrium Musicæ of Madrid, and others. Hmm, no Bach...have to rectify that. I don't listen to classical music all that often, but go on binges when I do.