Creative Soundblaster Recon3D Omega Wireless Gaming Headset for Xbox 360/PS3/PC/MAC - £184.58 Amazon
A great wireless headset and Amazon has it for the cheapest compared to the £209 price point everyone else is selling it at.
Works with 360/PS3/PC/MAC and you can connect to 2 devices at the same time.
4.5 stars on amazon reviews
Here's a in depth review: http://www.bit-tech.net/hardware/soundcards/2011/10/24/creative-sound-blaster-recon3d-review/2