Chris - I too have the AA Prima but is the second generation, which doesn't have a digital volume control. As I had to wait months for the second generation model I got to use the first generation Prima for quite some time. I did hear a noticable improvement in the second generation model. So, if you have the first generation I'd suggest upgrading to the second generation. I'm in Toronto if you want to discuss further.
Cheers,
Kevin
Cheers,
Kevin