This is always a tough question. I like your choices. I've loved everything by Q.T. and although their last two movies have sucked bad (Ladykillers, Intolerable Cruelty) everything else the Coen brothers have done is pure genius IMO.
Among modern movies my favorites are The Matrix, American Beauty, Spartan, Million Dollar Baby, Training Day, Donnie Darko... Too many to choose from.
Favorite foreign flicks are Amelie, American Cousins & Criminal.
Favorite Canadian movies are Ginger Snaps I & II.