I heard the Devore 9's recently and thought they were great. One of the best speakers I had heard in my search for new speakers. you would be lucky to find those second hand at all, and for $3000.
I like Zu too, but found they need the right amp. abit strident with the wrong amp.
Another one to consider, Acoustic Zen Adagio's. They look and sound very good and a lot around2nd hand for the price you are looking for. Not as good as the Devore's or the Daedalus Da-R Ma's I eventually went for, but still very good value
