Well... Thanks everyone for your advises !
When I read the article's title : omg ! Can't wait to see what they did wrong (...well not exactly but...)
When I read the article : meh.
You're right! I think I'll go with it... I'm just checking the big differences with the upcoming Mk II (except the 2000$ of difference, thank you Switzerland...) and if it really worth it... or I'll go with the A7s mk1
Hello Guy and thank you for your answer.
The GH4 is indeed a good DSLR but I really need something better for low-light. So I'm going with the A7s I think ! Thank you a lot for your answer.
(N.b. I always record audio from the mixing table during concert with a Zoom H4n ! :-) )
Hello Michael and thanks a lot for your detailed answer, I really appreciate it.
The GH4 look really great but is not very suitable for concert video right ? (very dark indeed so I need a dslr who can handle this). I think the A7s is a better choice isn't it ?