While my EM-ESL's are far from the CLX ART's you're interested in, my speakers and the ART's use a similar 8.6" wide panel. The ART's are much taller, for more of a line-array speaker. So, while my speakers are babies in comparison, they still portray a nice sense of dynamics, speed, and detail. Much better dynamics than many other planar magnetic speakers I've heard, and owned. In fact, one TOTL planar speaker I auditioned, with top ARC tubed gear, literally put me to sleep, they were so polite. Great imaging, but no slam. My little EM-ESL's at least offer a bit of slam (within their capabilities). A M&K sub helps too...!
Good luck.