Dark City
I don't really want to say a lot about this movie for fear of spoiling anything, so I'll keep this short and sweet.
First off: The plot is incredible. If you thought The Matrix was thought provoking, this will blow your mind.
The cinematography and overall design of this film are also incredible. Very dark, very surreal. Along with the spectacular effects, the whole movie looks great.
The actors are all very good as well, especially Keifer Sutherland.
Put simply, you have to see this movie. One of the best sci-fi films I've ever seen.
9/10