Hey there thanks for chiming in,
What genres of music. Any other genres of gaming? PC or Console? What FPS Titles? If this is PC since you mention ampless what motherboard?
if its fps related you can drop the x2hr. The shp9500 would be better for that from phillips. X2hr is bassy as hell and definitely isn’t good at fps… I know many claim otherwise and use it… you can use whatever you want but with how heavy the rumble and bleeding is from the low end of an x2hr its going to cloud a lot of fps sounds up.
with the headphones listed above you will most likely need an amp for them… not a deal breaker for sure but it may require some careful shopping around if you really want the best setup per dollar…
I can’t really make any recommendations till I have more information hence the questions above.