And FredA, funny you mentioned the Osborn Eclipse and nc500 as I am familiar with both and provides a good reference point. I'm actually surprised to hear you find the M3 bass better than the nc500 which is already very good, and although the Eclipse isn't super punchy, it has a natural relaxed sound so it's surprising (in a good way) to hear that the M3 doesn't make it a snooze
The Eclipse is a great speaker, not sure if you have heard Greg's other speakers but the Eclipse is probably his best value in terms of the sound you get per $.
I thought his Master 3 and 2H amps were already as good as class A amps (class AB without switching distortion), are his class A amps going to be even better in some other way?
My apologies for OT also