While I'm a tremendous proponent of standard headphones for gaming, the Audeze Mobius is supposedly an amazing gaming headset (I believe HyperX partnered and released a branded version for themselves as well, the Cloud Orbit S).
On a budget: AKG K7XX/712 is amazing because it has a super wide presentation. But if we are being honest, any really good open headphones will serve you well. Like rastus said, for instance, the HD700 is probably fantastic. I personally use a variety, but for fun it's my LCD2Cs and for precision it's the AKG 702 65ths.
Also boom mics aren't as needed these days with decent desk solutions from Audio Technica or Blue.