I haven't seen Nunn's version, but if I'm remembering what I read on here correctly, it was another attempt to turn it into a "musical" instead of just doing the traditional version. That said, I have no idea of what quality it is, though people on here seemed to say that it suffered some of the same issues that the current revival/revisal did. I think it planned to go to Broadway but ended up scrapping those plans.
"Art, in itself, is an attempt to bring order out of chaos."-Stephen Sondheim