What's the scarier movie.....The Exorcist, The Omen OR Rosemary's Baby?

The Exorcist by far -- scared the hell out of me, and can you imagine being a 9 year old and watch something like that in the middle of the night? I was scared to the point of not being able to sleep well for weeks! And I think the part where linda blair used the crucifix to "you know" is just beyond repulsive! I'll never ever watch that movie ever again as long as I live.