If I were you and were looking for fish to interact, in a tank that size you could put in a harem of genicanthus angels (
http://reefkeeping.com/issues/2005-02/hcs3/) 1M3F as they are pelagic and planktivores so should leave coral alone. I personally think that acanthurus olivaceous and acanthurus tennenti look spectacular when adult due to the nice lines and nice curve they get on their tails. Acanthurus japonicas is also a personal favourite, but as your in the USA you might have trouble getting one to survive. Any Xanthichthys triggers should be fine in that tank as well, from blue throats to red tails to cross hatch ($$). A school of banner fish or pyramid angels would also look nice. You could also explore a harem of Cirrhilabrus laboutei or Cirrhilabrus lineatus which would look proportionate in a tank that large. anyways lots of possibilities...