Hi Dave,
Whether you should buy the class A models or the class AB ones it depends entirely on your future speakers and your listening habits, i.e. on the amount of power you need.
The A-45 and A-46 class A models sound indeed better than P-4100. Both class A models have enough power to drive speakers like B&W 802 and/or 802 D/diamond to ear-bleeding levels. On the other hand, sound-wise there is little difference (if at all) between the A-65 and P-7100 (or P-6100 for that matter).
Regarding speakers, Accuphase pairs very well with Focal Utopia (forget Electra), B&W 800 series, Dynaudio Confidence, to name but a few.
How large is your room?
Whether you should buy the class A models or the class AB ones it depends entirely on your future speakers and your listening habits, i.e. on the amount of power you need.
The A-45 and A-46 class A models sound indeed better than P-4100. Both class A models have enough power to drive speakers like B&W 802 and/or 802 D/diamond to ear-bleeding levels. On the other hand, sound-wise there is little difference (if at all) between the A-65 and P-7100 (or P-6100 for that matter).
Regarding speakers, Accuphase pairs very well with Focal Utopia (forget Electra), B&W 800 series, Dynaudio Confidence, to name but a few.
How large is your room?