I've been looking at a similar group of speakers: Magnepan, Ohm, Spatial, and Eminent Technology.
Amongst several unknowns and challenges is the "direct sales model", used by all but Magnepan, which makes auditions difficult here in Dallas.
I just made my choice of speakers based upon available room placement.
Three of the contenders require 3 feet of rear clearance from the wall: Magnepan 1.7i, Eminent Technology LPT 8b, and Spatial M3. That is doable only on the short wall of my 14' x 24' living room.
HOWEVER, that position creates a cascade of issues: furniture placement, re-installing a tiled-in HDTV, removal of a beautiful bookcase to gain space, and odd room orientation once accomplished.
Choosing the long-wall position and a narrow Ohm speaker, which must be used close to the wall, has multiple benefits.
Positioning the Ohms on the long wall flanking my fireplace allows the use of the stereo gear in support of HDTV videos. The HDTV itself will not have to be removed from its tiled-in nest in the fireplace, and the resulting room will focus on the fireplace and HDTV as I think it should.
It might seem strange that I've given so much consideration to things other than speakers' sound. As I cannot easily audition 3 of the 4 contenders, and that a good used pair of Ohms has come available, makes it very reasonable to me.