Excellent review as usual James. As a side benefit I've been flexing the drywall in my room listening to the "American Symphonic Organ" the past hour.
Just a few questions you may or may not know the answer to:
1. Any port chuffing?
2. Could you tell the approximate port tuning center frequency?
3. Were you able to determine if the relative lack of midbass output was due to the amplifier running out of headroom or driver being limited by the DSP?
4. Trying to think of a hack to mitigate those razor blades...I mean cabinet edges. One trip and you risk being impaled by one of those corners. Maybe some flexible corner trim products?