Thanks for the input grk.
The Super Nines are the last on my list of speakers I would like to hear before making my next speaker purchase (likely the Joseph Audio Perspectives), but unfortunately they are not a speaker most of us can audition.
I heard the Gibbon X with some of my music and with the fist stuff I heard I really liked it - it had that beutiful Devore tone and texture, but more refined/modern sounding than the O series. The last couple of tracks I played on the X weren’t as satisfying as I was expecting (some Talk Talk songs) - some bass bloat and the drums didn’t sound as real as through the 0/96. But much of what I heard was promising so it makes me intrigued by the Super Nines.
Though the Stereophile review of the Gibbon X which detected some leanness and a trough in the lower mids would have me a little worried (apparently an oddity in how the mids crossover to the lows). I don't know if the Super Nine's would have the same issue, but it would seem a good hunch that they would share the same design choices.