#1 The Shining
Alien is top notch just for the exploding chest scene.
The Cell is okay...if you like J-Lo as eye candy.
Jacob's Ladder with Tim Robbins is decent.
Session 9...for something you probably haven't heard of. A crew of abstestos workers goes to clean an old vacant mental hospital and it gets inside their heads.
Not a horror movie per say, but Cube is a wierd movie(although not as wierd as Eraserhead). A group of strangers suddenly find themselves in a cube maze where a wrong turn gets you whacked.