have to disagree.
parachromis Friedrichsthalii fully grown would not even be able to turn around in a 60 gallon tank.
it would be fine to grow out but one day would be too big for a 60g.
also, if you decide to keep a large cichlid you can do so but it will have to be alone.
you could do a frontosa, midas, red devil, oscar, trimac, festae, green terror, all kinds of things.
another option would be some smaller african cichlids with some angels or parrot cichlids.
if i had an empty 60g i would probably put a couple salvinis in with some convicts or firemouths, a jd could do well in there too.