Good water for African cichlids. I'd collect a good number of rocks for the scape and stock 3 groups of smaller mbuna.
Saulosi are easy to find, and with the blue males/yellow females add a double shot of color to the tank:
Species Profiles -- Cichlid-Forum
I recently picked up a group of perlmutts, they're another smaller and less aggressive mbuna:
Species Profiles -- Cichlid-Forum
I'm still looking around for the specific variant of the afra I want (there are at least 18, from different collection points), will grab some when I find them for a good price. Here's a general profile:
Species Profiles -- Cichlid-Forum
There are a couple other species you could mix and match, these are what I'm thinking to stock in a 75 with some peacocks after I get the 220 up and running. If you want a really active and eye-popping display you could stock 12-15 demasoni and 5-6 yellow Lab's in the tank. The demasoni are extremely conspecific-aggressive, and need to be kept in a large enough group to spread it around. Stocking 4-6 will result in 1 that has killed off the others. The yellow Lab's aren't nearly as rough, but still mix well with the demasoni simply because they look too different.
Species Profiles -- Cichlid-Forum
Species Profiles -- Cichlid-Forum