Sennheiser HD 620S

The sound is the holy grail for me. They are great: lows, mids, highs are extremely well balanced (for closed back), they don't disturb, don't focus on any area in particular, nor lean towards any side - hyped or dull. Isolation is also great - these headphones would be my choice for tracking. However I'd buy some other headphones for people with bigger heads (for ex. me). I cannot imagine mixing even 2hours with them. They squize me and the pressure makes my head hurt, I loose focus. However sound-wise... they're perfect, I think people underrate them. I was comparing them with closed back headphones in similar price range: beyer DT-150, 770, sony mdr-m1, yamaha hph-mt8 - 620s is the winner. But the worst comfort.