CS-M1 is indeed a great microphone, but I wouldn't say it has a low self noise. That's its main, and probably only disadvantage. Compared to a KM185 or a MKH60, it is much more audible. You won't probably hear it outdoor, but you might be annoyed in a quiet indoor. I haven't tried other short shotguns though.
I totally agree what you say about handling noise and tonal characteristics. CS-M1 + Cinela Cosi combo is very pleasant to work with.
Very hot output also, but no distortion in my case.
Best,
Tristan