There aren't many directors with the stable of great movies and great moments as Joel and Ethan Cohen. The depth and range of their ability and their tone is astonishing; they can shift from broad comedy to horror effortlessly and sometimes within the same movie. Whatever you may think of No Country For Old Men (and I thought it was pretty good, though I'm not sure their stab at profundity worked at the end), for which they just picked up the big Oscars, you've got to say that the recognition was overdue.
I dare you to watch the clip and not want to watch every one of their movies. It's a murderer's row of classics, and even the failures are interesting failures.