Well, it's Halloween, so I have to report on some great music suitable for Halloween
Danny Elfman: Okay, almost anything he writes has dark undertones so I could pick just about anything. Also, most of his recordings are really very good. I'm going to recommend "Music for a darkened theater" both Volume 1 & 2.
Thomas Newman: Soundtrack from American Beauty. Not exactly Halloween, but it certainly has the right feel and it's a great recording.
Dead Can Dance: Well with a name like that it must be appropriate for Halloween. I personally like Labrynth.
White Zombie: Astro Creep. Again great name for Halloween and suprisingly for a metal band well recorded.
Hope you have a great Halloween.
Enjoy.