I haven't heard the MC1000, but I have heard the the MC500 with B&W Nautilus 802. The combination is excellent, as to my ear the MC500 "warms-up" the B&Ws a tad, together making really good synergistic balance. The 500 has plenty of power, and I would doubt you need to go to the 1000.
My experience with Accuphase products in general is they are more detailed than McIntosh gear, but flatter and more "technical" sounding. From your description of listening preferences, it seems that McIntosh would be a better match.
My experience with Accuphase products in general is they are more detailed than McIntosh gear, but flatter and more "technical" sounding. From your description of listening preferences, it seems that McIntosh would be a better match.