Just as a very bare bones list, I'll give you the one I have from facebook: Agalloch, Air, Tori Amos, Antimatter, Arcturus, Autumn Tears, Ayreon, Bela Fleck and the Flecktones, Beatles, Blind Guardian, Boards of Canada, David Bowie, Jeff Buckley, Johnny Cash, John Coltrane, Creedence Clearwater Revival, Miles Davis, Dead Can Dance, The Decemberists, DJ Shadow, Nick Drake, Dream Theater, Eluvium, Engineers, Estradasphere, Explosions in the Sky, Faith No More, Fantômas, The Flaming Lips, The Gathering, General Patton Vs. the X-Ecutioners, Genesis, Gordian Knot, Gorillaz, Handsome Boy Modeling School, Lars Horntveth, Iron & Wine, in the woods
, Incubus, Isis, Jaga Jazzist, Katatonia, Kayo Dot, King Crimson, Lake of Tears, Lovage, Mars Volta, Loreena Mckennit, Lovage, Mechanical Poet, Mr. Bungle, maudlin of the Well, Nevermore, Nick Cave and the Bad Seeds, Nine Inch Nails, Opeth, Pain of Salvation, Patton/Kaada, Pelican, Pink Floyd, Porcupine Tree, Prince, Queen, Rachmaninoff, Damien Rice, Rush, Savatage, Saviour Machine, Secret Chiefs 3, The Shins, Sigur Rós, Soundgarden, Igor Stravinsky, Subterranean Masquerade, Sufjan Stevens, The Tea Party, Steve Tibbets, They Might Be Giants, Tool, Devin Townsend, Ulver, Stevie Ray Vaughan, Antonio Vivaldi, Tom Waits, The Who, Brian Wilson, Winds, X Japan, Yes, Frank Zappa, John Zorn