i'm obsessed with perception and memory, so these might not be for you, but:

Wandâfuru raifu

japanese film about the afterlife. very, very good.

L'Année dernière à Marienbad

this is my favorite film ever. it's about a woman who meets a man who she had an affair with last year at the same resort she's currently visiting with her husband. or she didn't. and her husband knows. or he doesn't. and some other stuff happens. or it doesn't.