Yes, the decade is over, which means it's time to look back and see which science fiction movie was the best of its time.
But since there were a lot of scifi movies released in the last ten years, and I'm a lazy bastard, I'm gonna make you do all the work.

Post your nomination for what you think ought to be labeled the best in this thread, and a voting thread will be created later for the final tally. The only rules (at the moment) are that your nomination must have been released between January 1, 2000 to December 31, 2009 and that your nomination must be seconded by another in this thread. Otherwise feel free to discuss anything related to the nominations in this thread.
And since I started this, I'm reserving the right to make my nomination later, and not because I haven't made up my mind yet...