Some interesting choices there. I've not seen a couple of them but the rest are all definitely worth seeing. Dark City is especially good and reminded me of another film I forgot to mention in my list, The Thirteen Floor. Have you seen it?

The only film on your list that I didn't think much of was eXistenZ. I remember being quite bored watching it a few years ago.
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My all time favourite has to be the one that's already been mentioned in this thread:

The Empire Strikes Back

Great dialogue, great chemistry between the characters, excellent stuff.

Recently, I've also seen Children of Men, which was a pretty haunting tale. Highly recommended.
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Just read about Children of Men, it got very good reviews, will have to watch it. Also Casshern (from Japan) is well made with some great action scenes.
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Not a film, but a visual feast with a sci-fi setting. The animated Aeon Flux series.
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The Aeon Flux series is very strange and fascinating. Very perverse creator too! I've not seen the film based on the series. Was it any good?
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The movie was ok, not the most awesome thing, still cool though. Went along the lines of the matrix
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