I have 5, 7 stripe kigoma in a 75 gallon with a few syno cats, I love my fronts, But what are you looking for in a fish? If you want size, the burundi get 16", They also get the huge hump on its forehead. If you want to breed and sell I think the zaire blue 6 stripe would be the way to go, I would do some research on fronts, and talk to people and look at their fish, then make the choice of what to get. I think 180 you could get more than what you said you were looking for. Or put calvus or comps in with them. Calvus are slow growers so make sure they are at least twice the size of the fronts or they will get out grown and probally ate. good luck and enjoy