I have many different types of anthias as they are some of my favorite fish. I have never tried a sunbrust b/c like thedude said, they do not like high light. He is probably doing just fine so I do not believe you need to worry about it's health. Watch and see if it comes out at night. If you want to try others I highly recommend the bartlets, lyretail, and the hawaiian bicolor. I have several of each. Get at least 3 of each.
Also, If you can afford it the Bimaculatus Anthias is awesome!!!