I have the 48" halide fixture over my tank, and love it. It does run warm, but it is halides.
If you are looking at the 30" fixture, I would save up a little more and go with the halides. When i started out, i upgraded my regular bulb unit with power compacts, and then later upgraded to metal halides. I would have saved a bunch of cash if i would have skipped the power compact step.
If you plan on keeping corals, PCs will be fine for a lot of them, but halides are the way to go IMO.