I think the blue flasher would be a good addition. They're reef safe, but they *are* jumpers so make sure you have the top secure with egg crate, or a cover.
I'd strongly suggest trying to get one locally. I tried and tried to get one via mail order, and they just didn't seem to make it. I believe they're hardy fish once in a tank, but the whole transport/acclimation issue seems tough on this species. A good LFS
will order one in for you when they come up on their stock list. You'll have to be patient though.