I think i may have finally figured it out..
It will give me 9.5 inches of surface area, plenty for 600 gallons per hour. The return line is above the drain line so that i can angle the pipes to make it easier for me to plumb it the way that i want. I will probably do something along the lines of a Dorso for the drain, unless there is something better and or quieter out there. For the return i will either do Loc-Line directly or make a spray bar for behind the larger pile of rock that will be directly in front of it. I am going to use a mag 7 for the return so with the 4 feet max that it has to pump i should not get less than 400 gph out of it, and i will just tee the return line for the fuge. How does that sound?