The Beyer dt250 is a very good headphone; excellent sound, rugged design, relatively light, comfortable. However, they don't work very well for me at bumpy buses with lots of road rumble. I haven't tried them in the air yet.
Maybe nothing would work here, or maybe I'm just too sensitive. I found it pretty much killed the bass experience for me, flat EQ as always. It was like there was no bass at all, very weird. Of course I tried some EQ to compensate but then my ears started to hurt. This is the only disappointment I've had with these phones, ever.
You should be careful what you wish for with these cans, the effortless power capabilities and the low distortion can be very dangerous when fighting already loud noise from the outside leaking in. I almost never perceive the sound as "too loud"... it is like you can go on and on, rising volume until your head explode.
This does not prevent me from hoping you are right, Jagorev, that I will find them more enjoyable in the air! Otherwise I'll continue using plain earplugs since I can't stand IEM's for more than ten minutes.
PS. Something I found actually do work for me to keep noise out and a give a more relaxing journey with some music is ... PlaneQuiet NC-6. The difference between ANC and plugs IMO is that rumble is kept out better with ANC, and this is what is most annoying to me. Senn PXC series are even better.