Please rank these amps

@vonhelmholtz I wondered about the same thing, lots of similar speakers. 

@ideal8592 

Just curious…why so many speakers?  What qualities play into your idea of best?

you almost got it right. But M goes first, before N, the rest are in the right order.

Comparing a NAD to a McIntosh is silly they are so different and designed for different listeners, users, and buyers. 

Those are all very different amps.  What amp do you have now and what improvements and sound characteristics are you looking for?  What’s your budget, and are you looking for new or used?

I would rank all 4 amps behind any good point to point wired DHT SET such as a 300B or a 2A3 for powering your Zu's.

Jerry

Room is medium sized, speakers are along the long wall roughly 8 feet apart and 7 feet from listening, music runs the gamut from acoustic jazz and vocals to orchestral, have SVS SB-3000 sub for the lowest notes