Sorry about the delay. Glad to hear things are going well. If you are planning on adding corals, you will have to go light on the fish. Every living creature will add to the bio load of the system. I could make lots of suggestions, but it all boils down to what appeals to you. Any reef friendly fish should go well with what you have, with the exception of more royal grammas or damsels. These should be introduce simultaneously as they tend to become territorial. I'd use fish that are 3" or less if you want more variety.