Here's what we do.... get about a dozen of us to go in on this together and all buy this case. It's cheaper by the dozen, I would think.

Make it out of THICK aluminum. Anodize it or plate it. Build up some really nice systems.

Just need to make sure that EVERYTHING for the system has a place and that there is no wasted space or things that are overlooked. It might be a good idea to make a prototype and try out where everything would go, just to be sure. Sometimes things that look good in CAD have flaws that show up in the prototype or the C build. Smart move to ask for feedback on your design on the forums, btw.

Alternately, you could sell the design for $10 each or whatever and let us find our own manufacturer for the case. Looks like a lot of fun, clever how you have separate zones for each of two large radiators with room for both push and pull fans.

I'm new to water cooling, still planning out my very first build, probably for next summer when gulftown and fermi are out.