Mac and B&W are very synergistic. Very nice rich overall sound with the tweeter tamed a bit.
But I will say that I formerly owned the MC2102 (100 WPC tube amp) and the C1000 3 piece preamp with Wilson Watt Puppy 7s. I was determined to purchase the MC 2301 monos. When I went to my local dealer and listened to a full Mac system with my preamp and the 2301s , I was ready to buy. Then my dealer suggested swapping out the upper tier Mac electronics for a mid level Audio Research preamp and amp---just for a listen. I was a bit insulted at first --as I was a died in the wool Mac tube fan having owned a number of Mac components and I thought the salesman was a bit presumptuous to suggest that I might prefer an ARC system which I assumed he preferred at less than a third the price of mine.--I was astonished about how much better the ARC system sounded, especially in the midrange. I heard previously unheard detail on numerous test cds I brought with me. These were cds that I had listened to hundreds of times. I could count the background singers on one Van Morrison track when before they sounded as a massed group. I heard each individual voice and how the harmonies were constructed. This type of detail added to musical enjoyment. On another track from a David Byrne cd, I clearly heard low level detail in the midrange that I had never heard before. And the sound was not harsh, just revealing and much more transparent than Mac with a light touch of sweetness.
I went back home to my system and listened again to those tracks. Even knowing what I was missing and listening for them--the sounds were simply not there--masked by a slight scrim over the sound that makes Mac easy on the ears but far from transparent.
I was upset at the time as I knew that I had to sell all of my Mac gear and go ARC. That conversion occurred years ago and I remain glad that it did.