There
are lots of threads about this but never mind
I have a Peltor headset on loan to me and find it great but I'm not sure how it would fare for commercial although it was used professionally by the generous FI who has lent it to me. You would be better off looking at something like the BoseX ones. I wouldn't have Dave Clarkes as I find them nasty, heavy, less well fitting, uncomfortable, with a tendency to slide off my head and with poor noise reduction although I'm sure plenty of people think they are wonderful and some won't like my choice. To be sensible about things you should get yourself to somewhere which sells a variety of makes and see which you find suits you best.