Have to agree with a lot of these, although for the Star Wars/Terminator/Matrix series its the first movie of each that stands out for me. Particularly the wonderful atmosphere in The Matrix - that stands up to many repeated viewings. Several of these I have heard of but haven't seen yet, will look out for them
I was very impressed with these:
Sphere - very creepy with a nail-biting finish
Twelve Monkeys - one of Terry Gilliams best I reckon
Altered States
Does 'The Time Travellers Wife' count? Intriguing idea and a beautiful story.
How about Metropolis? I still haven't seen that but its meant to be fascinating.
John