Peter,
You're getting a lot of great recommendations. Wish I had time to go try some of them myself.
My vote is for the
beyerdynamic DT770 reference headphones. Here are the
full specs.
Closed-back circumaural type. Large diaphragms with great power capacity allow you to listen at near-live levels. Response from 5 Hz to 35 kHz but very neutral. Field-replaceable parts. Substantial feel in your hand, yet you nearly forget you are wearing them. I wear glasses and they don't interfere.
I have used the same pair since 1996, when I got them for medical transcription because of their excellent acoustic isolation. Where I began to really appreciate them was when I realized that I was wearing them for 8 hours on shift and going on to use them in the studio after work. They are the most comfortable I have ever found. They are obviously durable as well.
Around $200 USD, a little less if you look around.
Let us know what you decide--I know it'll be great whatever it is.
Richard