Captain Rich
Supercharged
Nigel, I opted for a ChatterBox GMRS X1. It's self-contained, runs on it's own rechargeable battery and can be worn on your belt or clipped to the helmet. It accepts iPod (or equivalent), cellphone, and pillion headset along with providing bike-to-bike communication (it uses something in the U.S. called Family Radio Service (FRS) with a range of around 5 mi) - don't know if this is legal where you are). I like it because it doesn't take space on the bike and I can bring it only when I need it...my only regret is that it is FRS and not CB (Citizen's Band) - CB is more widely used on bikes here. They also offer rider-to-passenger models that don't use the RF broadcast technology but still offer cellular and iPod connections.
Lot's of places sell it, but here's one of the sites: www.chatterboxusa.com
Lot's of places sell it, but here's one of the sites: www.chatterboxusa.com