Beyerdynamic's legendary DT series headphones have for years set the standard for studio mixing and general video and audio production—in fact, nearly all of our videos have been mixed with a pair of DT 770s. The entire range of DTs is comfortable (velour earpads are a nice touch), with highly detailed and expansive sound, featuring crisp highs, accurate mids, and a nice low end. Of course, you shouldn't just think of these as studio-accurate headphones; they're amazing no matter what you're listening to. And their rock-solid German construction is icing on the audio cake.
The DT 770 Pro is the closed-back version of these phones. If you're looking for open-backed, check out the DT 990 Pro.