io9.com are running a series of Scifi 101 articles - basically, listing the essential books, TV shows, films etc. that you ought to check out if you're into the science fiction genre. Their list of 25 films includes the usual suspects (2001, Planet of the Apes, Alien, Blade Runner...), but not The Usual Suspects. It does include Eternal Sunshine:

Eternal Sunshine Of The Spotless Mind (2004, dir. Michel Gondry). This film works on so many levels. It's a metaphor for the ways in which you try to erase someone from your memories and your life, after a breakup, in order to reinvent yourself as a single person. And yet, the film manages to suggest, that process is a form of suicide — you have to destroy a piece of your life in order to excise your former lover from it. And since that process is also the reverse of falling in love, maybe it leads you to realize why you fell for the other person in the first place. But Eternal Sunshine is also an incredibly clever science fiction movie that introduces a bizarre new technology in a way that's both surreal and believable. (Source)

Y'all should check out another film on the list, Primer. I'm crazy about Primer. It's like Memento meets Pi meets Donnie Darko. You could view it online for free a few weeks back, but I think it's been taken offline.