Coral Selection?

[Chin_Lee]

i would pass on the sun coral only based on the feeding regime required to keep them alive which usually pollutes your tank in the meanwhile.
I would also pass on the galaxy coral based on its long (very long) deadly sweeper tentacles that will kill all other corals within 8-12 inch diameter

You may wish to consider the following:
rbta
phosynthetic gorgonians
clams
bubble corals (green or white)
lobos