For those disappointed to miss the ASDA deal the other day (£20 but expired very quickly) - Argos appear to have the Sony DR BT 22 ik reduced from £79.99 to £39.09 - plus I think you can still get a couple of pence extra off if you buy via Quidco? (£51.99 + £6 p&p at Amazon Marketplace).
Argos show 43 reviews averaging 4.5 stars - Amazon reviews are more mixed. I just tried a colleagues BT 21 G headphones which look the same (came free with his 8 GB Walkman) and they seemed excellent to my uneducated ears - worked at least 5metres away, and only cut out when I cupped my hands over the earpieces.
Features as listed on Argos site:
* Stream music wirelessly from your iPod in your bag or pocket.
* Adjust volume, play / pause and skip tracks from the headset.
* Headset and transmitter have been pre-paired for easy connection and use.
* Lightweight and comfortable fit.
* Transmitter power supplied from iPod - so no additional battery or charging is needed.
* 11 hours continuous playback time.
Hope this is helpful to someone out there....