Bear,
I have a pair of Stax sr-80 pro headphones. They are far from the best Stax phones out there though. They are not the ultimate in low end extension,, but are very enjoyable and non-fatiguing otherwise
I like electrostatic headphone designs like the Stax myself for the low fatigue factor.
There are many really good phones out there though I am sure. Frankly, I am not very up to date on this topic so I would hesitate to offer other suggestions. I've owned good Sennheisers in the past and liked those. Ive heard very good things about certain AKG models as well. Goldring sells headphones these days as well...haven't heard them, but I have high respect for that brand from their phono cartridges, FWIW.