IMHO and as stated on the title of this thread, IMHO the L10 and M10 are the best newly launched SS amps for the past 5 years, till June 2021.
(I can't predict the future
What really impressed me are their Naturalness
They have more of everything than CH's previous amps and possibly ss amps of every other brands …. beauty, timbre, density, details/resolution, macro-dynamics and micro-dynamics, ambience and acoustic information ... etc.
The list goes on & on.
They are extremely immersive & involving.
I soon forgot my initial aim of evaluating them but simply enjoyed the music during all 3 visits.
They are quite like my MSB Select combo in characters.
Between L10 and M10, the former must be the invincible brother.
I guess there isn't any poweramp which is unsuitable to pair with L10.
For the M10, the speakers used and the listening room size are the two confounding factors.
I think one stereo M10 betters a pair of M1.1 monos easily.
If the room is large and the speaker very power-hungry, bi-amping (such as by a pair of A1.5 + a pair of M1.1) will have advantage over a stereo M10.
Of course CH Precision offers an upgrade path of Mono L10 and Mono M10.
But the price will then be astronomical! haha