WNR, I've flown for years with a standard black Peltor helo set, very tough though they may not look it, noise attenuation is excellent, light weight and very comfortable, particularly if used with the earpad protectors which are absorbant stick-on paper, and the headband pad. They are VASTLY superior to the David Clark which are horribly heavy and uncomfortable.
I did own a Pilot which was a copy of the Peltor and it was so cheap and nasty I threw it after a month.
Not tried noise cancelling myself, found the Peltor so good I didnt want the hassle and considerable expense of batteries. After 10 yrs/3000hrs in light turbine helos I still have no appreciable loss on the audiogran trace which I think says it all.
Bon chance!