I've been using my 5DmkIII in a Nauticam housing with external monitor mounted to a scooter to shoot video, but would like to reduce the size and complexity. I've determined a Hero3 will give me sufficient quality if enough light is available, and I use two Bigblue 30,000 lumen lights in dark water. AFAIK, the DeepPro is the only GoPro housing supporting bulkheads for HDMI port (or leak sensor, etc).
If you have a DeepPro or similar dedicated video setup that has or supports an HDMI bulkhead for external monitor, let me know!
I had not seen that one, but it's the same price as the DeepPro and appears to have a proprietary monitor connection. I want to keep using my existing external monitor. Do you have one of these for sale?