Big,
They don't fit the "High end" mold. They are far too smooth and neutral, and perhaps at first listen a little dark. Compare to B&W 801s or Golden Ear speakers to hear what I'm talking about. I'm not criticizing, I'm just saying, these are two different schools of speaker design.
If I absolutely could not build my own speakers, the top end MA are on my short list. AMAZING performance for relatively affordable speakers.
They absolutely deserve the best you can give them in terms of room acoustic treatment, you'll be rewarded.
Best,
E