Comparisons from those who have heard…

Hi everyone

Apologies in advance for the somewhat open ended question here, but i wanted to see if any members had directly heard any combination of these listed amplifiers and could share any opinions ( they are all on my short list ) - i know its a bit of a stretch, but thanks in advance for sharing any comparative impressions you may have~

Yamaha M5000

Marantz MA9s2

Accuphase M75 (or 65)

Luxman m900

Exclusive M8

I have some relatively demanding speakers (sony ss ar1) that i may look to pair with one of these in the future, hence the question~

thanks!

Samuel