I can't help with identifying the film, but I'll make some recommendations.
Cat People (1942)
The Spiral Staircase (1946) Haven't seen it, but sounds like it fits the bill.
Night of the Demon (1957) aka Curse of the Demon
The Manchurian Candidate (1962)
Many of Hitchcock's are appropriate, including:
Suspicion (1941)
Notorious (1946)
Dial M for Murder (1954)
The Man Who Knew Too Much (1956)
North by Northwest (1959)
Psycho (1960)
The Birds (1963)
The
Alfred Hitchcock DVD Information Site will tell you what best available versions of each title are. There is a
Hitchcock thread running in this forum for many years. If you have a region-free DVD player, you will have more choice in the films available to you, and won't have to settle for inferior versions. The most recent R1 (North American)
Warner and
Universal boxsets are excellent value and recommended to anyone who likes classic films.
To discover the best version of other films, try
DVDCompare,
DVDBeaver, searching these forums or possibly the
Home Theater Forum (sic). From
IMDb's Top Movies page, you can get lists of 50 films in each genre with the highest user ratings.