I wish I had more time to post a comprehensive review, but I don't.
So I'll be posting short observations as they occur to me.
I have a pair of dark espresso towers with ribbon tweeters. They replaced my Sierra-1 NrT loudspeakers. The towers are truly amazing. Besides the clarity in sound and the impeccable tweeter, the first thing I noticed is the effortless dynamics. It really sounds as though the dynamics are limitless. Even with music at the loudest listening volumes the towers just seemed to smugly glare at me with a "bring it on" attitude. And they never sounded like they were working very hard. With the Sierra's, you could notice them begin to struggle at extreme volumes.