Hex. tank advice...

[TANGOMAN]

I'm considering a hexagonal tank in the distant future and I'm unsure of what an effective overflow design and sump arrangement would be.
I use the "Durso" style standpipe on my current tanks. This probably wouldn't be a great arrangement given the space lilitations of a hexagonal shape. I wouldn't consider an overflow box. What are your thoughts on the "ultimate in quiet" overflow using a drilled arrangement.
And how about a sump. Obviously it wouldn't be very large. A smaller hex. tank...? $$$ Custom made "square" tank ? I would want enough space for the pump, heater, top-up float valve, and a small skimmer, yes Bob, I said a skimmer... Perhaps a CPR bak pac ?
I appreciate your thoughts on this...