I've only flown one day with my new DC H20-10s but they are by far the quietest headset I've ever owned and very good sounding.
They are slightly more heavy than I was used to with my Sigtronics I used to own, but there is enought padding and great design to make it more comfortable, even though its heavier.
So, my vote right now is the DC H20-10s...
(I've flown Bose, and quite frankly, haven't been that inpressed)