I do not believe that I have seen SN that low for CS 2.4- special speakers indeed.
I think it may become a future classic. It is a really unique design. I don't know what others are thinking but there are really nothing about the new speaker designs that interest me. Maybe I would like to listen to some of the Vandersteen's some day but others than that, there are not too much out there that catches my attention. A few years ago, Absolute Sound named a pair of speakers (I'd rather not reveal the name) that costs about $100K as the best speakers in the world. But other than the all aluminum cabinets, the design is more or less a square box with slightly rounded edges to improve diffraction. It uses high order filters and the drivers although were specifically designed in house, I am sure I could obtain similar quality drivers either from Scan Speak, Seas or Accuton. I am a bit disappointed in general in most speaker manufacturers. Most of them are just too derivative.