I have owned many Sonus Faber (including Extrema) and Dynaudio Confidence 5 in the past. Very different speakers, as anyone would guess. SF is more musical and warmer sounding, Dyn on the other hand is more detail and truer to the recording even though they share the same tweeters. Both love power which you don't have an issue. But placing close to back wall, very far apart, and capable of playing loud seem to all favor Extrema. But Extrema will be more difficult to integrate subs because of the design, so you need to take that into consideration.
I doubt there is a big sound difference between Esotar and Esotar 2, so Extrema should still be competitive in sound and definitely a much much better looking speaker than Special 25.
I doubt there is a big sound difference between Esotar and Esotar 2, so Extrema should still be competitive in sound and definitely a much much better looking speaker than Special 25.