I hate the headset debate but I was curious too. I have been wearing a bose X for a 4 years now and I think its the greatest thing since peanut butter and jelly (in the same jar) But I have had a wandering eye lately.

The mach 1 looks good because of its light weight and the fact I can just stuff it in my flight bag instead of carrying the bose deluxe

After my first ride in 2 different t-props the other day (SF340, Dash 100) I am not sure that anything other than my bose could tame those noise levels. Who knows...