Let's put this whole business behind us and let me give you some titles of compositions by post-Mahler composers and contemporaries that do not suck:
Debussy: Pelleas et Melisande, Jeux, Chansons de bilitis, La Mer, Noctures, sonatas
Berg: the operas, Chamber Symphony, Altenberg Songs and the pieces you mentioned earlier
Schönberg: Piano Concerto, Pierrot Lunaire, Herzgewächse, Erwartung, Chamber Symphonies, String Trio, Buch der hängenden Gärten, Orchestra Variations, 5 Pieces for Orchestra, Serenade
Bartok: 6 String Quartets, Bluebeards Castle, Music for Strings, Percussion and Celesta, Piano Concertos, Violin Concerto(s)
Elgar: 2 Symphonies, Falstaff, Introduction and Allegro, Violin- and Cello Concertos, Piano Quintet
Walton: Symphonies, Concertos, Troilus and Cressida
Stravinsky: Les Noces, Oedipus Rex, Rake's Progress, Violin Concerto, Mavra, Agon, Apollo Musagete, Orpheus, Persephone, Baiser de la Fee, Cantata
Strauss: Salome, Elektra, Rosenkavalier, Frau ohne Schatten, Metamorphosen, Oboe Concerto, 4 Last Songs, Arabella
Webern: Orchesterstücke op. 6, Variations op. 28, Cantata 1 and 2
Ravel: Gaspard de la Nuit, String Quartet, Introduction and Allegro, l'Enfant et les Sortileges, Piano Concerto, Shéhérezade, Le tombeau de Couperin, Mallarmé Songs
Janacek: Every single opera of his!
Britten: Peter Grimes, Billy Budd, String Quartets, Nocturne, Serenade, Michelangelo Sonnets, Winter Words
Pfitzner: the songs! Palestrina, Piano Concerto
Lutoslawski: Symphonic Variations, Piano Concerto
Franz Schmidt: Symphony 4
Frank Martin: Petite Symphonie Concertante, Golgotha, Die Weise von Liebe und Tod des Cornets Christoph Rilke
Hindemtih: Mathis der Maler, Symphonische Metamorphosen, Ludus Tonalis, Das Marienleben, Kammermusik 1-7, Mörder, Hoffnung der Frauen, Cardillac
Reger: Bach- Hiller- Mozart, Beethoven-Variations, Symphonic Prologue to a Tragedy, Piano Concerto
Vierne: Piano Quintet, Organ Symphonies
Chausson: Le Roi Arthus, String Quartet, most of the songs
Busoni: Piano Concerto, Berceuse Élégaique
Sibelius: Symphonies, Tapiola
Prokofiev: Symphonies, some of the operas, Piano Concerto nr. 2
Ives: Concord Sonata, Symphony nr. 4
Diepenbrock: Im grossen Schweigen, Elektra, Marsyas
Willem Pijper: Symphony nr. 2, String Quartets
Vaughan Williams: Symphonies 4, 5 and 6, Riders to the Sea, Job, Piano Concerto, 5 Tudor Portraits, Serenade to music
Orff: Der Mond, Die Kluge
Tippett: A Child of our Time
Korngold: Die Tote Stadt, Violin Concerto
Schreker: Die ferne Klang, Die Gezeichneten
Zemlinksy: Lyrische Sinfonie, Florentinische Tragödie
Honeger: Jeanne d'Arc au Bucher
Milhaud: Le Boeuf sur le toit, La Création du monde
Zimmermann: Die Soldaten
Berio: Rendering, Sinfonia, Folk Songs
Puccini: Turandot, Fanciulla del West, La Rondine
Szymanowski: Król Roger, Violin Concertos
Hartmann:Simplicius Simplicissimus
Messiaen: Poemes pour Mi, Quatour pour la fin de temps, Visions de l'Amen
Etc, Etc, Etc
I could go on, and on, and of course, you've already stated your opinions on Stravinsky, Schönberg, Webern and Berg in a previous post and it's always a matter of personal taste. Maybe it's just the wording of your orginal post, but I assure you, none of the music by these (mostly post Mahler) composers "and their CD's.." sucks!