Ultrasone is my vote. I know they're expensive, but they're worth every penny.
I don't work for them, but here's my sale pitch: Besides having superior sound, they are also the safest for your ears. They use a certain technology which sends the waves around the ear instead of directly into it, which saves your ears from a beating.
Your ears are microhpones. Very expensive ones. In fact the most expensive microhpone in the world, is not as good as your ears. The proof: your ears can tell the difference.
If you can spend thousands of dollars on mics, keyboards, equipment, studio, PA, etc, you should deffinitely consider investing good money on the safety of your ears. A microhpone you can replace; your ears only give you one chance!
Chony