I've also had "A tale of Two Sisters" recommended, but have not yet seen it -- although apparently I've seen the American remake called "The Uninvited" (which I would say has some good parts and some bad; the acting of the sisters is good).
I'm a huge Asian horror buff, and Audition is without question a classic. It's one of those where the less you know going into it the better it is.
Heh, i think it's so good cuz it's so flawed -- they sacrificed certain sensibilities to free them up in other ways.
They definitely managed hit some sort of magic ratio of creep to camp. Not to derail too much, but they're planning to make the show into an "anthology" of horror stories where each season is basically its own universe. It sounds pretty innovative if it actually works out. Here's an article talking about it:
Anything by Takashi Miike is good for weird. I love his work. Visitor Q is amazing in its bizarreness.
As for disturbing, The Mothman Prophecies, it may just have affected me worse, but it did keep me up alot of nights.
A mind that is stretched by a new experience can never go back to its old dimensions. - Oliver Wendell Holmes Jr.