well for something that large i really only know of two good brands and would only recommend these two as well. If you intend to keep large predatory fish, then a decent sized and efficient skimmer wouldn't be a half bad idea. Id get either a euro reef or a deltec. Both of these brands are rather pricey but will give you the best results on such a large volume of water. will the placement be in sump or external?? If external id plumb separately with designated piping that would either lead back to sump, or back into tank, with the help of a in line pump.