This was asked at HH2:

Bob Stuart was asked which M speaker would sound best in a phone box?

His answer was "DSP8k".

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.