I was thinking about doing a all melanochromis set-up in my 75 except the kenyi. I would move the red zebras to my 55 and probably add some m. johanni to the 75.
sounds like a great tank. high on aggression but will look fantastic. you'd want to be willing to swap fish in and out and back to the LFS if you get a bit of extra character' in one or two'...i.e. for character read murderous blood lust lol
Maingano and chipokae look too much like the auratus male and female. I think I will go with M. Johanni, L. Kenyi, and M auratus. They look just different enough for it to work....maybe. I also just noticed one of my "female" auratus changing to a darker color. I will need to remove this male as soon as I can since I already have a dominate fully colored male.