I wear a helmet for some of my flying because my head does get knocked around the cockpit in severe turbulence, and I can't imagine what a headset would do to protect you. Not much.
If you're looking at a headset, don't disregard the Lightspeeds. They're great headsets. They've had some problems in the past (plastic headbands), but they do fix them without question, and immediately. I think the current crop are probably much better.
You can purchase a refurbished 25XL from lightspeed right now for three hundred, or three fifty. They're taking tradeins for people upgrading to the new 30 that's out. Something to think about. I got one of the earlier ones years ago when they were doing tradeins to the next model up, got it for a good price and it worked.
At the time, the headset I was wearing, a standard DC type with the oregon aero treatment, couldn't drown out the APU, or the engine noise. All communication was done in sign language and gestures, because the airplane was too loud. We had an ICS, but it wasn't useable. After going to the lighspeed, I could talk and hear on the ICS for the first time. I was impressed.
The headset broke one day during a departure; one earcup fell off. I used a roll of electrical tape in my flight suit to make a quick repair. I was on the road and unable to send it in. Two months later I had an earcup problem. The next day was my day off. I overnighted it to lightspeed. I was off for one day, and the following morning when I showed up, my headset was waiting, refurbished again, new power supply, new ear seals, new cord, no charge, they paid the returnshipping.
No problems since then. I think the quality of sound is as good as Bose, and they're more comfortable. I'd buy one again if I were looking. I spoke to a gentleman the other day who was using the new 30G, and he said he wouldn't trade it for anything.