I agree with Scott. The tank doesn't need a skimmer, just consistent partial water changes (PWCs), and get the refractometer instead. Hydrometers are notoriously inaccurate. Also, I agree in part with goisles, as I would skip the Bio wheel (they are better for FW
). Live rock is the best biological filtration, but if you want additional filtration, like I have, I would highly recommend the Aqua Clear 50 for that tank. It has 3 stage filtration with carbon (which may beome necessary, as it helps you keep a more diverse stock, and will eliminate any medications that you may have to dose the water with for certain things. The filter also has porous ceramic media, which allows for additional biological filtration by housing aerobic bacteria. like goisles said, Decide what you want to keep, and research the lighting requirements now. Do yourself a favor. So many of us make the mistake of buying lights, now, and later find out they aren't suitable for something we'd really like to keep. You can house the most w/metal halides, but can keep plenty of things under power compact. So....do the research..you'll be happt you did.
Also...props to Mike on the link he posted. That ought to help you a bunch when deciding what to do. Also, I'd go with a 125W heater in that tank. Get TWO (2) tank thermometers...as you may have seen on another thread around here, someone killed almost their entire tank because the thermometer was faulty.