My encounter with all three of these speakers was enlightening in the extreme. I heard the WP6 first as line demos that were displaced in favor of the WP7. I had never before been gripped by reproduced music to such an extent. Entertained by my response, the salesman asked me if I wanted to hear something even better. He directed me to a room of identical dimensions where similar electronics were playing the WP7s. I was absolutely transported. Jimmy Scott was singing "All the Way" with all of the emotion wrung out of each note. I had an overwhelming emotional response. I left that store and embarked on a six month search for a repeat of that performance. Having carefully (and enjoyably!!!) auditioned nearly 20 systems featuring speakers in the $10k-$40k price range I was unable to equal or eclipse the response that I had to the WP7s. The Sophias "sound" very similar. However, they didn't whisper or shout nearly as convincingly as the WP7s. The WP6 was not as subtle a transducer as either the Sophias or WP7s, and made it less easy to immerse myself in the music. I'm guessing that it might be the extraordinary dynamic finesse of these speakers, throughout the audible spectrum that makes them so beguiling.