Since moving in with 'the wife' and sacrificing my surround sound system, I've been playing with only TV speakers of late. It's fine, but not great. I also now tend to game later on at night now too so the surround system would be impractical anyway.
So, I've set my sights on a headset; specifically the new Sony Pulse Wireless Headset. Have read some cracking reviews from across the pond (released in the UK on 14/11/12) and it looks thoroughly decent.
Anyway, while price comparing just now I see that the thing varies in price quite wildly, with some sites charging £140 for it.
Play.com have it at an unbeatable pre-order price of £79.99, so, heads up for you there ;-)