Wow. That looks great. I love the idea of a remote sump. What program did you use to do the rendering?
Also, Most of the people around here would agree, Have the tank drilled! Now's the chance. You won't have to worry about your overflow losing syphon, and flooding that nice piece of furniture.
you do beautiful work. i wish i had the space and tools to build something similar well, not as big since my new tank is a 30 breeder how are you going to finish it?