I bought option #3. I think I offered $150 and they countered $175. Not bad with free shipping since it must weigh 50 lbs! You weren’t kidding about LOUD. I was expecting vacuum cleaner – or maybe blender. This is more like fighter jet taxiing to the runway.
Preparing to install a new HSF I discovered the CPU has no fan! There is a shroud funnelling air and the front-to-back little case fans are doing all the work. Helped in part due to a massive copper heatsink that puts the Thamaltake to shame! And the case, while not beautiful, is actually a great case if you have a place for it. Room for 12-14 drives. 400W Gold PSU.
Instead, I cut a hole for a 92mm case fan directly over the CPU and installed a quiet fan. Not mounting it into a rack, the fan sticking out of the top is not a problem. Unfortunately, Unraid plugins cannot detect the fans properly - or at least not that I have figured out. So I plan to disable and remove the loud internal fans, but I would keep them if I could figure how to throttle them.
All in all $175 + $8 fan + cost of drives makes for a cheap, easy, and so far quite fast Unraid box!