Have you ever heard a song on your Ipod and though "Yeah, this is SO Silent Hill"? I do, a couple of times.
Personally, I think Watch Me Bleed by Tears For Fears is really melancholic and kind of surreal. This could also go for the rest of the album (The Hurting).
Also, Given And Denied by Poets Of The Fall. In fact, screw it, anything by those guys would suit Silent Hill. Vatra should have asked THEM to write the theme. I've never heard of KORN, but I'm sure that POTF would have fit the game (and the series in general) like a glove.
What about you?