sfx.co.uk wants to know what is the best SF movie ever?

If you look carefully at the right sidebar of this websites homepage,
a little lower down, you'll see The SFX Poll. you don't need to
register, just vote!

What is the best SF movie ever? It's a toughie. We've narrowed it
down to 10 choices, and now we want you to cast your vote from this
selection. We'll leave the poll up for three weeks so that you get a
chance to register your opinion. Tell your friends and get them to
vote too!

We're hoping to get some kind of definitive answer on this one,
folks, so click away and come back in early April to hear the final
results

http://www.sfx.co.uk/page/sfx?entry=the_best_sf_movie_ever

The 10 choices:

Back to the Future
Serenity
Planet of the Apes
Forbidden Planet
Star Wars
The Matrix
2001
The Terminator
Blade Runner
Alien