That Kent is overkill for your tank. Not that that's a bad thing, but that skimmer if 4 feet high. Is it going in the basement? You may want to look into something like the ATS skimmer which is 25" high or a euroreef which is 30" high (both rated for 500 gallons).
Dennis, I have not seen a HOB
large enough for that tank. The skimmer needs to sit next to the sump, below or next to the aquarium.