Hey guys, do you know that headphones have different type of soundstage for the stereo mixing. (Narrow/ Wide)

I learned yesterday that my ATH-40x has narrow stage and this was causing me problems with stereo mixing.

I think i need to upgrade my gear, to play some of these games, i'll do this in future maybe, if i get another job, right now i am upgrading my skills for some post production jobs, if anyone can help me to find one, I'll be very grateful (in music or audio stories related). :)