I found this site by researching Spatial Audio M3 speakers. I am considering M3's for a 2 channel system. I heard them at Linear Tube Audio and really liked them.
Whichever 2 ch system I build, I'd like to incorporate it into my current 7.2 home theater system.
I'm also dabbling in headphones. ZMF, Focal, and Hifimanare current favorite manufacturers.