Naim and Zu should be a good match. I have not heard them together explicitly but wold be shocked if they don't work well together. Naim gear tends to be warm and Zu performs well with warm amps.
I have run Zu Essences with multiple Art Audio Amps and Marantz and found warmer sound profile of the those amps to be a good match.
I have run Zu Essences with multiple Art Audio Amps and Marantz and found warmer sound profile of the those amps to be a good match.