I own a Accuphase A45 for abount one and half year, driving Dynaudio Sapphire with ease. It is a very fine and dynamic enough,very clean yet musical amp. I don't feel any shortage of punch with this amp. I have yet to listen to A60 or A65.
I listen to Plinius SA103 driving Dynaudio contour S3.4 at dealer showroom, plinius sound more lively, smoother and concert hall effect whereas A45 sounds darker, very quiet background with the same power of bass production as SA103.
I have no problem in long hour listening with A45 but I suspect SA103 may have long hour listening fatigue. Any SA103 user please have your opinion. Thank you.