you do know these are larger cichlids and their temperments vary from fish to fish. I had a venustas that was fine in a mixed 180g until he became the biggest fish then he beat on his tank mates until I could rehome him. most people will tell you 1 male to 2-3 females to spread out the aggression. that's where I think you should be. if you wanted all males be prepared for when there will be issues like another large tank, rehoming , turn back in to the lfs etc...