If you're feeling adventurous, my hunch is that the Conrad Johnson Synthesis Reference 4 tower system currently on auction is probably excellent. I don't remember seeing them EVER for sale second hand. HOWEVER, I have never personally heard them (have heard a different speaker in that line), and due to one experience I had with a different brand years ago, I refuse to purchase speakers without first listening for myself. That will never change.
-Bill
-Bill