Would be a great tank for a comm of L114s!!
As I said, do plenty of research and planning, if you're just going to have a sump for filtration its going to have to handle a fair bit of turn over. My two drains are only just keeping up with the flow from the Laguna 7500 pump, but there isn't much of a vertical drop because of the height of the tank either. Seriously consider an automatic water change system, in fact its a must-have with a tank this size. I still haven't got mine sorted, I think about it every week when I'm doing a 450L water change, there's plenty of time to think when you have to drain that much water! If I were doing it again I would also include several stages of mechanical filtration, first a settling chamber, followed by something with a couple of layers of filter wool that can easily be changed and thrown away, then the filter socks to polish the water. As it is now I have to change the socks every 3-4 days, even with the FX5 running on the tank.