i would put an arowana for top level, 3 peacock bass,marble sailfin catfish(leiarius pictus) ,,adonis pleco.also a large piece of driftwood.its a deep tank so fish that inhabit different water levels would maybe make up a nice display
myself... I just built a 310 for an Arowana and Oscar etc... put rocks in it and now i'm regretting not doing africans in there LOL... still love the fish i have but like 100 africans would be sooo cool looking