They're good headphones, but not the best for gaming because of their small sound stage. Try a pair of Sennheiser hd 558 or Audio Technica AD700x. The AD 700x has a nice wide soundstage and the 558 comes close, but the AD 700x lacks bass. Not saying the 558 is bass heavy, but it will have more bass than the AD 700x.
I owned the ATH M50s which is the exact same thing as the M50x w/o a removable cable. Great pair of headphones for music, but honestly not the best for gaming, especially if you're into fps games.