Corsair VOID 7.1 Surround Wireless RGB USB PC Gaming Headset Carbon for only £69.98 at Scan.co.uk. Usually £90+.
Corsair Gaming VOID Dolby 7.1 Wireless Gaming Headset with RGB Lighting, 50mm Drivers, 2.4GHz, 40ft, USB, Black, for PC
Good headset. Though, if you don't care for wireless I'd recommend the HyperX Cloud II at Argos right now. :P