I recently reviewed the Sennheiser HD595 and, with sufficent (4-5 days) burn in, I quite liked it. I was using it quite frequently in the office whenever closed headphones were not convenient (eg., when I needed to be able to hear my phone ringing).
Wide soundstage; open/airy; forward presentation; single-end detachable cord; comfort
Construction; styling/color may be gaudy for some; little isolation (if you need it