I own the Atria II driven by Soulution 5 series in a small room 15 X 8 ft. Extremely musical speakers, beautiful sounding speakers and if I had the opportunity to go up the line in, it will be the Avior II provided I have a dedicated space to them in. I auditioned the Cygnus, Mira IIs before buying the Atria IIs as I didn't have a dealer with any Rockies on demo where I live as it was like hens teeth.
P.S. I have put up some videos of these speakers driven by the Soulution on YouTube. The videos don't do justice to listening to them in the flesh. Pure joy.