The Belgian Police use CEPs because of the threat of loosing their hearing but they are used in combination with wearing a helmet.
I believe the helmet CEP combo is the way forward and if you can't have the CEPs at least have a helmet because that's is what is stopping the noise getting into your head.... This what I have garnered.
At the moment you don't see to be able to buy CEPs in the UK which fit under the helemet and plug into the helmet because Headset Services have given up on the one's they offered because they could not stand the abuse of wear and tear.
The Danes use
these they will be on my shopping list next.