Consider LED if you DIY, a while longer for a commerical fixture as they are just now starting to use a greater number of spectrums.
Halides work well for all sorts of coral, and a good setup can be found used for cheap, though you need to be here 3 months to see the used selling forum. Heat can be a problem with halides as they impart more to the water through radiation. The extra electric usage by halides is minimal for me, about 10 bucks a month, but places with stupid rates like California would be 3 times that.