I have a MF Nuvista preamp which came out just before the A3CR. As I understand it the circuits are similar, but the Nuvista was limited production (500 units) using Nuvistor "tubes", where the A3 uses SS devices.
I love my Nuvista preamp and will never sell it. If you can find one they go for ~$1000 used. Else, based on the reviews I would be inclined to give the A3CR a try, and save $300-$400.
I love my Nuvista preamp and will never sell it. If you can find one they go for ~$1000 used. Else, based on the reviews I would be inclined to give the A3CR a try, and save $300-$400.