Alex - I have very similar views on Orton (though can't claim to have as detailed knowledge of him) and especially the movie of "Prick Up Your Ears". A fascinating version of a fascinating subject. Must also mention the wonderful Alfred Molina, who played the embittered lover/murderer - he was top.
And BTW - Full marks for knowing 1. Who Wallace Shawn is and 2. The existence of the delightful "The Princess Bride".

Remember - "Never go up against a Sicilian when death is on the line"