I recently listened to the III Novas and had heard the previous version III in the same room and similar Arcam Pre and Classe’ amp.
The biggest difference to me was that the Nova wasn’t bright and more subdued and maybe a little too laid back for my taste. I was comparing them to the Kanta 2 and in my opinion they were a tad bright, but not sure if it was the electronics. They were using Cambridge, can’t remember the models. The Kantas delivered much more bass but the Nova 5 should easily fill that gap. I would say if you love your III’s you really love the Nova 5.
The biggest difference to me was that the Nova wasn’t bright and more subdued and maybe a little too laid back for my taste. I was comparing them to the Kanta 2 and in my opinion they were a tad bright, but not sure if it was the electronics. They were using Cambridge, can’t remember the models. The Kantas delivered much more bass but the Nova 5 should easily fill that gap. I would say if you love your III’s you really love the Nova 5.