So honestly I have an aristochromis christyi... And I wouldn't get him again for a mixed hap/peacock tank. While they look great, they just think everything is food... I mean he hasn't eaten anyone but he hovers over a few of my peacocks and nips at them (ie trys to eat them). And in fact he has caused 2 serious eye injuries.
(You have a couple of other larger haps too, say the venustus and livingstoni that I think would just cause other fish to be afraid and not show as much color.)
Besides that it looks good.