I have had a pair of these wonderful speakers since mid September, auditioned them with a Naim integrated (at one store), and a McIntosh C50/MC452 pre-power amp combo (at another), which to me sounded smoother, so I bought the McIntosh separates, and really enjoy the combination. When I’m really cranking it, the needles on the power amp dance around the 4.5 mark.
I have an "all digital" setup, music server, PS Audio DirectStream DAC and transport, streaming Tidal on a Dell laptop, etc.
Six months in, the speakers have "mellowed", sound better all the time. Great detail, soundstage, excellent depth, no plans to replace the Sopra’s.