I've heard the Volti Vittoras at 4 shows---2011 Capital Audio Fest, 2011 RMAF, and 2012 and 2013 Capital Audio Fest. I like the Vittoras a lot, so much that I seriously considered buying them after my first exposure to them at the 2011 CAF. They combine very impressive dynamics and pretty good detail with an overall coherency that is pretty unusual in a 3-way speaker.
The main thing I did not like so much was the lack of adequate low frequency weight when they were run without a sub. I realize Art Dudley says they sounded just fine without a sub so perhaps a different room might be a better match, but what I heard in the small hotel rooms was not full range until the sub was switched in. Unfortunately, the Vittora was not as coherent when run with the sub. I have had enough experience with subs to know that I would end up playing them without the subs and for my tastes they did not go deep enough. I also noticed a trace of "pro sound" coloration in the Vittoras but I can't say if that may have been due to something else in the system.
For whatever it's worth, I didn't feel the Vittoras sounded quite as good in the other shows as they did in my first exposure to them at the 2011 CAF and RMAF. I believe the designer Greg Roberts said he made a number of changes to the Vittoras during this timespan and he considered them improvements, but I enjoyed the sound in 2011 more than the other occasions.
I also have to say that I haven't warmed up to Greg's other models. The Vittora is the one with the magic.