@murray So far they're pretty solid. I got the XR624. Nice sweet spot and enough switches in back to compensate for some top and bottom issues. I'm not sure if they're broken in yet. Probably not. I have IsoAcoustics stands so I haven't tried them with their included foam pads, but they seem fairly dense. They are resolving enough that Google Music sounds notably worse than TIDAL. They also clearly expose the semi-brittle sound of my Steinberg UR28M interface. If you switch on the Auto-On function, they turn off if you listen at nighttime levels. A bit annoying. Buy you can flip the switch off.