They sound really good, and damn does my room need acoustic treatment bad. First track listened to was the 1812 Overture recording from Telarc, when the cannons blasted I got 110dB peaks; you could really notice the lack of acoustic treatment in the room but the speakers did not seem strained whatsoever. When the cannons came in I was absolutely terrified as well as amused.
I used Norah Jones to hear female vocals because in all the other speakers I have, she tends to make the midrange mushy and wonky (horn-sounding). The dual mids on the speaker really helped and I don't think the mids were ever driven hard enough to sound wonky, even with the 1812 Overture. Male vocals I used John Fogerty's album, Blue Moon Swamp. I love Fogerty's music and the cd has some very well recorded vocals and instruments. His voice was crystal clear and when put in louder SPL's it was never strained.
I won't comment on imaging and soundstage since the speakers are not in their final position and the room is currently an acoustical nightmare with tiled floor and bare walls with no bass traps, absorbers at first reflection points, or diffusors.