>if there is a speaker that is a worthy competitor of electrostatics and planar/magnetics/ribbons, with respect to reproduction of timbre, using "conventional" drivers, i would want to audition it, unless i have already heard it.
The Linkwitz Orion (open baffle dynamic dipole) midrange is more similar than different (I prefer it). The sweet spot is much wider and placement less critical. The (dipole) bass goes louder and deeper than a full-range planar (like the CLS) and is much more natural than the (box) bass of a hybrid like other Martin-Logans.
The Emerald Physics CS2, Jamo 909k, Nomad Ronin, and Gilmore model 2 and 3 are also current production dynamic-driver dipoles with different design compromises and price tags.
Other commercially produced examples exist along with a pile of DIY designs (You can build Orions, NaOs, or the Adire DDR from plans).