Oh, man, I'm using my M50 while playing hardcore free-for-all in Black Ops 3. And man, these cans are fantastic for gaming! I'm hardly missing the AD900x. Sound positioning/directionality is spot-on, except for when sounds come from directly behind. I won 4 or 5 matches in a row, thanks to these awesome cans.
Hey, paraphn, you should try the ATH-MSR7, if you can. I've heard good things about it. I enjoyed reading your thoughts and opinions about the M50, by the way!