Agreed, newbies need to vote, it pains me to see BttF this close to Die Hard, all you newbies need to make sure Die Hard pulls away, if it's not ahead by at least 15 votes then something is wrong with the world.
The truth of the matter is that they are both excellent films, and though Back to the Future is in almost every way a "better" film I totally understand somebody choosing Die Hard. Die Hard is a ton of fun, and it's probably the best action movie ever made, which must count for something. That said, I just don't even see how Die Hard is more entertaining. Back to the Future also, in my opinion, has a much better variety of memorable scenes and sequences, whereas Die Hard, due to its single location and simpler plot, feels more like one long memorable sequence with all the smaller memorable moments feeling blurred together.
But that's just me.
Of course, I can't stay this reasonable for long (my mustache and monocle only go so far) and I do have to end on a more serious note: If you don't vote for Back to the Future I will personally coax Michael Bay into making three more Transformers films, each longer and more stupefying than the next. I will then get him to do remakes of Casablanca, Citizen Kane, 2001: A Space Odyssey and Rear Window.
I do think the choice is clear.