Thanks for everyone's comments. Glad I have plenty of time to make my mind up on this one and no particular medical urgency.
My only thought is that at the age of 50, I might have several decades life left to put up with how my head is now (my Dad is coming up to his 93rd birthday) and how bad would it feel in say, 20 years time? If I opt for the new headset, better to do it soon, while I'm still in reasonable health.
One particular down side is that I wouldn't have young ladies in the street staring at me any more - even if I do feel like a fairground attraction at times!