REVIEW: Turtle Beach Call of Duty Black Ops II Ear Force Sierra gaming headset (Xbox 360, PS3, PC)

Looking to get an edge during your Black Ops II online matches? Turtle Beach's latest Call of Duty gaming headset range includes the Ear Force Sierra, designed to offer just that with its 5.1 surround sound delights. But can it improve your game enough to justify a price tag just a few pounds shy of £300? Read our full review to find out!