On personal note I'd love to see Aintree, Liverpool Bad Tour 1988. A crowd of over 135,000 people and by the sounds of the amateur audio it sounds like a great concert. It was also shot on film and intended for release (see Man In The Mirror blue shirt from Moonwalker)
Other than that I would love to see New York 1988 because I think that has the potential of being one of if not the best show Michael performed going off of the audio and snippets we have. His performance seemed electric
In all honesty, provided it's watchable, I'm not that bothered by the quality of the footage more so by the quality of the performance. I'd rather them release a really good upscaled show, like we just got with Copenhagen, than a super duper HD 3D Mike is sitting next to me on the couch it's so clear, HIStory tour show.
Just my thoughts