These are the ones I've auditioned or owned.

Open: 1. Sennheiser HD600 2. AKG 501s 3. Sennheiser HD570s

Closed: Sony MDR V6, Grado (Can't remember but like all grados, HORRIBLY uncomforatable)

In Ear: Klipsch Image S4

Portable on Ear: Koss Porta-pros are some of the best sounding headphones I've ever heard. I've own two pairs over the last 10 years. The lifetime warranty is stellar. Best $50 set in the world by a mile and they have been the best since the 1980s.