Awesome work, Excellent design. Looks like you planned everything out. I have are a few questions though.
1. When you decided to increase the height of the case to accommodate the EVGA W555 board, why did you decide to add another 5.25" bay instead of adding space for another HDD or two?
2. The knobs on the front are exposed with little protection from bumping, have you thought about making a flip cover for them and recess the knobs so it appears flush with the front of the case?
3. Where did you get a sketchup model of the W555 board?
4. For the CPU loop, would you get a more even flow across both CPUs if the Tees were in between the two blocks? (See poorly made diagram below)

How you have it
░╔════╦══ Pump
CPU░░CPU
░╚════╩══ Radiator

How I suggest
░░░Pump
░ ╔══╩══╗
CPU░░░░CPU
░ ╚══╦══╝
░░Radiator