I am trying to deside between a regular 48' T5 fixture or power compacts. My tank has no coral yet, but i plan to put in a variety of almost everything except sps. (lps, zoes, a few mushrooms and some softies) Can anyone give me some pro's and con's?

55g w/ live rock/ sand
15g fuge w/ 24" power compact (mix of algea, ruble, live sand and pods)
no fish/ coral