One thing to take note on before buying.. a rough definition of what you buying.
Studio is accurate sound signature, usually as flat as possible with no added highs, or bass, or effects
DJ is more tuned for music, with better bass, and usually made to sound similar to what comes out of speakers when DJing and with high Noise Isolation.
Gaming is lower sound quality, with a mic, and most of the money is spend on marketing or on aesthetics
My preference is a Studio set free EQ software package.
Equalizer APO
https
/sourceforge.net/projects/equalizerapo/
Some of these Headphones also just don't seem loud enough with the wattage coming from the PC or Phone. To fix this issue tube amps fills the gap, they add a warmth to the sound along with amplifying but they do tend to get pricey, my unit was $75.
This is something you should think about, do you want accurate precise sound with no added frills that can be tailored or a big sound stage that is less accurate?
Here is what your getting with the M40X and in my opinion they are well worth it.
http
/www.soundguys.com/audio-technica-ath-m40x-review-1494/