I'm going out on a limb and saying "Inglorious Basterds" is Quentin Tarantino's best film. It avoided the cliches and annoyances of his past flicks (don't get me wrong, I enjoy most, such as RD, PF, KB, etc).
I think Basterds will go down as his best film, and will stand the test of time for obvious reasons. The dramatic elements were actually quite believable in this one, and the cinematography was top-notch. I can see this film being studied for years.
What an impressive, enjoyable film.