Yes, the 430 will run three 4' lamps, though I believe Tony is right about total output being around 220 watts. Here's Icecap's application table:
http://www.icecapinc.com/apptab.htm
As for stony corals that I have kept under VHO are: Caulastrea Furcata(candycane/trumpet), Bubble Coral, Fungia , and Euphyllia divisa(frogspawn).
HTH