This is the one.

Once upon a time, I read Richard II. Years later, I read it again. The first time it didn't do much for me, the second time I thought it was OK. Then I got the BBC Shakespeare box and watched the Derek Jacobi version, and I sort of went ... gaga. It was like it all clicked into place, and now Richard II is suddenly one of my favourite Shakespeare plays.

Derek Jacobi is a musician, singing Shakespeare's lines with heartbreaking beauty. And of course, having Wendy Hiller, Charles Gray and the one and only Gielgud on board does no harm :-).