This is a great film to begin with although perhaps not the best of the Harry Potter series.
Having a great mix of colourful, vibrant scenes and dark, mysterious scenes, HP1 gives your HD set-up a bit of a challenge and it doesn't disappoint. The film is displayed brilliantly in 1080p HD DVD - much better than DVD. Colours and details are fantastic and the darker scenes are made much more visible and have greatly improved clarity. There is little or no graininess in the picture either.
Soundtrack-wise, again, the HD DVD produced a much better quality soundtrack than DVD and although I cannot yet decode the HD soundtracks, I cannot wait to re-watch this film with an improved soundtrack.