I simply can't. There is too much diversity and too much quality to make such a decision. I can say that it wouldn't be Killer's Kiss or Spartacus, and I'm looking forward to finally seeing Fear and Desire when Kino releases it this fall, actually about three weeks from now on October 23, if the date is still set. Of the others, they are each so astronomically excellent as to make the comparisons futile.
Your hand will lead you to fruit -- Bill Murray