I had enough spare parts from previous systems laying around my office to build a second rig. It's not as elegant as my other one, nor is it a custom loop, but I found other ways to be creative. Notable features are the braided cables to the GPUs and the "stealth" ODD. My only regret is not having a rigid SLI-bridge to put in it.
Everyone hates on reference but I love the look of these, and the blower design works well for the air flow in this case. Both cards have been overclocked 200+ on the core and 400+ on memory.