idk... those widebar silver dollars are quite nice looking. But, I would actually go with pairs of convicts.. You have to be stragetic when u place there territory, or w/e territory they claim. Make it all the way against the side of the tank and limit their line of sight.. otherwise they will have an imaginary line, that one of your other fish crosses, they go after it. (Saves more room in the tank.) The live food stimulates your predatory fish and sharpens their instincts. My jag cichlid always looks forward to that time of the month when my convicts breed.