Working in an open office environment doesn't tend to lend itself towards good concentration. This is where the DT770 PRO's come in as they're closed and rather BIG. With just a bit of volume, you no longer hear the office chatter and get well defined dynamic range in music. Consider a headphone amp as they are a little harder to drive, at 250 ohms.

I've worked as a dance music remixer and DJ for a number of years, and these cans are my favourite for critical monitoring. They don't fold, and there are no unnecessary gimmicks to break or lose; they just offer excellent sound, Beyerdynamic's legendary ambient sound attenuation, and are so comfortable you could wear them all day. And they're reasonably priced, too. Top marks.