ASUS ROG Orion Pro is great for 7.1 audio for pinpoint FPS gaming.
Razer Tiamat 2.2, this headphone is one I'm hoping to buy myself, it's really on a class of its own, it's got 2 speakers and 2 subwoofers. It gives the most immersive bass you'll ever feel and hear, and since there's 4 speakers total, it gives a 3D effect which also helps to pinpoint where the enemy is. To be honest, even studio headphones are good enough to accurately spot where an enemy is, it's all about how you adapt to the headphones you're using.