I own or have owned almost all of these headphones listed here and here are my thoughts as for gaming.
K712 Pro and the AD1000x/2000x are by far the best for an overall gaming experience.
AD700x are by the best competitive FPS headset ever made and it's not even close.
HD598SE are a great gaming headphone, better than its big brothers the from the HD600 series.
HD600/650/6XX lack good imaging for me to recommend for gaming. The HD660s are OK for an overall gaming experience.
Philips Fidelio X2 are a good gaming headphone but have too much bass to be used for competitive FPS play.
K553 Pro and the ATH-M40x (M40x > M50x) are a great pick for closed backs but I would learn towards the K553 Pro.
DT 990 Pro/Premium you can hear footsteps a mile away, but ouch those highs are high.
Superlux HD668B are a good pick for the price but save up a few more dollars for the AD700x.
K712 Pro and the AD1000x/2000x are by far the best for an overall gaming experience. AD700x are by the best competitive FPS headset ever made and it's not even close. HD598SE are a great gaming headphone, better than its big brothers the from the HD600 series. HD600/650/6XX lack good imaging for me to recommend for gaming. The HD660s are OK for an overall gaming experience. Philips Fidelio X2 are a good gaming headphone but have too much bass to be used for competitive FPS play. K553 Pro and the ATH-M40x (M40x > M50x) are a great pick for closed backs but I would learn towards the K553 Pro. DT 990 Pro/Premium you can hear footsteps a mile away, but ouch those highs are high. Superlux HD668B are a good pick for the price but save up a few more dollars for the AD700x.