The answer to your question is "no" the A21 does not sound as close to as good as the JC1's. I have owned both and the JC1's represent a great value for mono-blocks.
I currently own the Bob Carver 180 tube amps and they would be a great match for your speakers. These are incredible amps!
I currently own the Bob Carver 180 tube amps and they would be a great match for your speakers. These are incredible amps!