Can anyone suggest a good pair of cordless headphones? They'll mostly be used for watching films but occasionally for music. Also, what about the pros and cons of the Philips HC8580, HC8650 and the HC8850? Any thoughts on comfort too? I don't really have a budget. Obviously I'd prefer to spend as little as possible but would be willing to go up to about £120 if needed (i.e. if the quality was that much better). Cheers guys.