JSDEAN,
I have about the same setup and have had no trouble with my mushrooms, button polyps, star polyps, finger leather, toadstool leather and pearl bubble. Of course all these, except the pearl bubble, are soft corals. I do know people who have kept hammer corals with roughly the same amount of light and a good friend of mine has an anenome in a 30g tall with 30watts NO of light. Not sure what type of anenome but nothing exotic.