bigbloke if you really intend to fly 100 hours per year (which would be way above the PPL average), then don't even dream of buying anything else but either a Bose-X or perhaps a Clarity Aloft. I have the Bose-X and am VERY happy with it. Others here have said good things about the Clarity, which is about half the price. I didn't get a chance to try them but was tempted.
To reiterate: hearing loss is irreversible.