I like Bigkidz recommendation of Alon II or IV. They are definitely smooth & musical.
The other one that shocks me as to have not been mentioned here so far is the Vandersteen. The 2CE and predecessors are the #1 selling high end speaker of all, from what I've read. Something like 50k pairs have been sold. You could probably find their 3A below $2k used. They aren't perfect, but given your priorities, you owe it to yourself to hear them. They also hold their value well, and are easy to sell if you ever decide to go in another direction. Cheers,
Spencer