One of the all time greats. The scene in Amadeus where Mozart is on his deathbed composing and Salieri is acting as anamnesis is just an absolutely genius use of sound design.
I got to see Forman introduce some of his early films at a retrospective at Lincoln Center. Loves of a Blond and Firemans Ball and some experimental avant garde animated shorts. Very funny stuff if you can find it!
There is also a "making of" documentary about the filming of Amadeus in Prague that I think should be on youtube somewhere.