Im setting up a system with 2 large displays connected with a common sump. One is a 700 gallon tank and the other is 400 gallons, both reefs. There will be about 350-500 gallons of sump volume. Im looking for a skimmer for the system. The ones I am currently considering are Reeflo orca III, ETSS 3000, and possibly MRC 60" industrial needle wheel. I dont have the space for multiples, and the bubble kings are absolutely ridiculously overpriced at that size. Any suggestions?