You are right to go down the studio monitor route remi, much better performance for the price!
I have a bit of an obsession with headphones, I keep buying unnecessary pairs of cans and gifting them to family and friends. I’ve got the 681 among others, very good soundstage for positional audio, footsteps etc. They are a little harsh on the treble, nothing a little EQ won’t solve.
I use this mic,
It seems ok but I don’t have to listen to myself.