I think you have a system that could be used to keep anthias, and yes, a tank with a large number of them would make a fine looking display.
Before you do this, I have two questions you should ask yourself.
First, the anthias will be the bulk ot the fish population. Do you really want the tank devoted to this fish? Many people would, but make sure you do before you get anything.
Second, do you have the knowledge, experience, and time to care for the fish? Remember, they are plankton feeders, so you'll need to feed at leas twice a day. Water quality must be maintained. Anthias are not an easy fish, although there are ones that are a lot harder to keep.
Be sure you are up to caring for this fish.