Yes, the panels are around $3,000. Was looking at a used pair of Summits, but discovered they are only slightly newer than the Prodigy and I have never heard the Summit.I would recommend giving the newer models a listen. I have 11A's and am now very happy with them (take forever to break in).
Replacement panels are expensive and will take awhile. I ordered a set of CLS panels in Oct and have not heard anything.