given the outstanding speakers you now have, i'd say you know what you're doing....condition, condition, condition....300 to 600 bucks is my guess.
I've a pair and am very impressed. The ribbon tweeters and mid-ranges sound sweeter than my Thiel 3.6s. The bass is strong and controlled but the weak point, such as it is, is with the integration of the ribbons and the woofer. It works OK but one can hear the transition.
I did put on spikes on the base - I've a concrete floor - and internally braced the woofer box and added Dynamat to the interior walls. These minor mods made a noticable difference in tightening the bass.
I've tried to bi-amp them. Direct wiring helped but adding a Rane electronic turnover added too much "op-amp" sound so back to single wiring.