I also think I liked the Atma/Zu combo better than Gopher, who went from the Atma to an 845 amp, that I am pretty sure provided even more tonal density. I was coming from SS amps and with the 6SN7s I used (Black Treasures, RCA, and a couple others) I had tonal density that I was very pleased with. But it is always going to be a matter of personal preferences and system synergy.
A great combo, if that combo matches well with your prefs as a listener.
A great combo, if that combo matches well with your prefs as a listener.