You should watch the original Dem, it may be because i saw it first when i was young but it's a favourite of mine, the kids are much more creepy.
Also i thought the book was good too.
It's available in a box set with it's sequel that should be pretty cheap now, the sequels not bad either.
I haven't seen Survival in awhile so will rewatch it soon. love the final image.
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MIKE: I've got it! Peter Cushing! We've got to drive a stake through his heart!
VYVYAN: Great! I'll get the car!
NEIL: I'll get a cushion.