Coral Suggestions

Howdy folks. I was curious about some hardy corals that would work in my tank. It's 30 gallons with a 20" 96w quad bulb, 45 lbs of LR, DSB, a few mushrooms, and one bullseye mushroom. The inhabitants are a fire goby, tomato clown, future yellow watchman goby, 7 scarlet legged hermits, 2 turbo snails, a few skunk cleaners...and that's it. I don't plan on adding anything soon, until the tank establishes itself (5 more months to go). I'd just like to start doing research in advance. I really like colony polyps and xenia, but am open to just about anything. Thanks folks. Oh, and I'd consider my flow moderate.