Here are the ECM8000 results.
It almost sounds worse in a box, even though it measures near perfect.
So I rewired everything down to just one amp in pure-analog to simplify things, and it still sounded a bit off.
But, I think I might know a solution.
It sounded really good when played in the extreme left and right corners of my room and another 6 inches taller, which is another 3ft further to the listen position.
Not sure why but I think it has to do with it's coupling to my room. WEIRD.
The B&W's FST midrange is just too good for this cheap of a mid, me thinks.
They are loud and efficient, and apparently measure good... but they just don't sound as musical in the lower midrange and upper highs as the B&W's do (without digital trickery applied).
I'm not fully convinced yet. Perhaps massive amounts of polyfill will make the winning difference, or not.