Hi Emmanuel, I have posted this in a PM as well...
I nearly always consult Daniel Wallace’s book as a first port of call. Greek Grammar Beyond the Basics. There are three reasons for this, it is focussed on Koiné Greek, it is quite good, and I have it on Accordance, so I can look it up very quickly.
If I want to go further I first go to BDF - because it is focussed on NT Greek and quite accessible.
But my Gold Standard is MHT, as I am more classically trained. As LSJ is my Gold Standard lexicon (though less used that BDAG).
I am sorry, but I don’t feel in a good position to comment on Turner as I have used it by far the least of the 5 volumes. It’s interesting, but not a very frequented tome (I don;t even own it, I borrow it from my local seminary library when needed). My first four volumes are well-thumbed though.
Sorry I can’t be of more help.