They are simple to get feeding but sometimes only take frozen until they are settled before they begin eating flake and pellets.
They shouldn't cause any problems with your proposed other fish if you go for the flame and lnh. Other species can be more predatory and I've read by Dr ellen thaler, a fish behaviourist, that spotted hawks pair up and kill chromis as they come out of their coral heads. We need to remember that these are predatory species even if they are less inclined to kill anything we'd normally add to our tanks. The whole "they killed my cleaner shrimp" even when they wouldn't out of the reef is possibly more likely boredom than hunger. I think they are great fish and you don't really need to sacrifice much to keep them.
