bucket_and_spade
I used a Bose X for my last year on the 146. It had (and often needed) a pilot intercom system. I found the Bose an excellent headset.
On the 717 with no real need of an intercom system, I grew sick og having one ear cup on the side of my head so went to a Plantronics MS250, though it doesn't have any noise attenuation.