I have a 300 with a giant overflow (66" long) and six 2" drains in it that'll move pretty much as much water as you like. Also with it is an awesome cabinet/stand with a built in electrical panel with about a dozen inputs.
I'll make you a great deal if you come to get it in Virginia Beach. That'll require some extra muscle power though, the thing was built with 3/4" glass all around (including the bracing, overflows, etc.). It's currently in a storage unit, though, so loading access would be simple.
Send me a PM if interested...