Which is the best audio magazine?

Agree with the high value of 6moons for two reasons;
First they offer the best pictures of the insides of the gear they review, I believe this may be a requirement (that they be allowed to post pictures of the insides) in order for them to review gear.  I have a pet peeve with manufacturers who keep everything a secret (think Wizard of Oz - what are they hiding) and and I will not buy from those who "void the warranty" if the user opens the case.  
Second, Srajan does have quite a bit of experience with a wide-variety of gear and is a pretty good writer, even though some don't care for his color commentary.  I like how he usually provides direct comparisons with similar gear, and gives his opinion, without necessarily promoting everything new as being better.
When I purchased print magazines, I liked HiFi+ for the great pictures.

Yes 6moons is good for discovering products you might not otherwise. 

Hi, I am also a sound lover who has been in the business for more than 20 years. There are a number of audio journals that I regularly follow:
https://www.soundstagenetwork.com/
https://www.hificritic.com/
and  https://goo.gl/86MZHC
Hope they will be useful for you

I’ve always liked Dick Olsher, and there’s a lot to like in the writing of Art Dudley. Both are avid music lovers with well-developed listening skills, and also technically-informed. Because of John Atkinson's bench tests, Stereophile is imo indispensable.

Hi-Fi Choice and reviewer Johnny Darko.
I'll add 'Z reviews' on youtube to.