I play Call of Duty (MW2/MW3) on PC and Xbox 360.

PC Specs:
i5 3570k @ 4.7 GHz
EVGA GTX 680
8 GB Corsair DDR3 1600 MHz RAM
Intel 520 120 GB

Monitor:
BenQ XL2420T 23.6 inch 120 Hz

Setup:
Razer Death Adder
Razer Black Widow Ultimate
Astro A40's and Mixamp

I record Xbox with the AVerMedia Live Gamer HD, and I record PC with Dxtory.

I edit my videos with Sony Vegas.