Large skimmer question

[dwerbs87]

I am in the process of building a large aquarium with a total of 350-450 gallons of total water once you take out the space the live rock takes up. It will probably have around a medium bioload. What would be a good skimmer without blowing the bank. I like the super reef octopus cone design but seems like its either small or way to big. Any suggestion would be much appreciated.