+1for sennheiser hd25s.
I make videos for a living and have used hd25s for 15 years. I travel a lot and always take them with me. Way better on a plane than the hideous noise cancelling ones and comfy for long periods (often all day)
Good, flat response, no ‘super bass’ nonsense.
Oh, and one of the the pairs I have now are 6 years old, get dropped constantly whilst I’m working and are still going strong, really robust.
Have occasionally strayed from them but I always come back.