For that much water volume and a large bioload, you'll obviously want a very strong skimmer. Some of the larger Euro Reef skimmers (CS12 series) would work nice, but the best bang for your buck would probably be a Beckett-injected skimmer. My Reef Creations, Precision Marine, and Barr Aquatic Systems all make nice Beckett skimmers, and the ratings they give are fairly accurate with actual skimming results.