I will be auditioning the Bryston 4b3 Monday and the Accuphase P-4600 on Wednesday. I did find out the you can run the e4000 or e5000 Integrated amps as an amp bypassing the entire pre amp section by using the XLR power amp inputs.
I will report back on my auditioning experience.
I think what so far has impressed me about Accuphase is their natural sound that can be listened to at any volume. As you increase the volume the overall character stays the same. I like that.