I have a pair of 1976 klipschorns with updated volti audio crossovers. These 40+ yr old speakers have no right to do the things they do. I would put them up against modern speakers several times what I paid. And I have owned many (and I do mean MANY) of the more conventional speakers like Wilson audio, von schweikert, magnepan, green mountain audio, piega, etc. just to name a few.
The klipschorns involve me in a way that most other speakers can’t. And contrary to conventional wisdom, they can even image very well. The icing on the cake is the dynamics that can be achieved with very low powered tube amps.
For the peanuts you would pay for a used pair, they are a no brainer. Of course there is the provision that you have a fairly large listening room with two good corners.
Oz