Without the first Body Snatchers, odds are you don't have NOTLD.
The Exorcist - scared the hell out of me as a kid. As an adult, I find Father Karras' arc (loss of faith, putting his mother in a home, his guilt coming at him in the form of Pazuzu) to be the more terrifying, "grown-up" horror. If I had a kid, I might feel Ellen Burstyn's plight more heavily.
And the Version You've Never Seen sucks because it lets you in on the demonic shit before the characters are. In the original film, you experienced it as they did, and that was powerful; in the re-edit there are spooky faces hovering behind the characters and whatnot, which is less scary than your kid pissing on the rug in front of company. Doesn't add to the film. Overtinkering.