don't look now is overrated crap. people like to talk about how hot the sex scene is. it's really not.
nicolas roeg = bad director
julie christie = bag of antlers
here's some thoughts on roeg:
http://www.pretentiousmusings.com/bad_timing.html
as far as pure thrillers go, i recently saw the audrey hepburn film "wait until dark." it's based on a fairly well-known play. extremely well-written; it's not gory or anything anything like that, but very suspenseful.
seconds is a masterpiece, though. shocking so many people have never heard of it.