i can't believe i'm saying this
, but in this case i'd go with the t5's, for one reason everyone complains about coralife bulbs, saying there crap. then again think through about what you plan to keep in the long run, if clams, sps and acans interest you, they thrive under intense light with great results, i know 70-175 watt are real popular with soft coral keepers. insufficient light makes clams look pretty dull and you don't get all the full colors you can. under 400 watt mh my clams and sps look great and are growing good, but my soft corals are pretty miserable about it. clam has nice highlights and stripes, i'm sure you could get the same with a good t5 fixture though-