Audio Technica ATH-M50X Just got it recently and they're awesome. They do not have active noise cancellation. Since they are over the ear, they cover the ear and with a good set of ear pads, they block out all office noise (unless you work in manufacturing ;) )

Based on reviews that I've read (not compared personally) they are much better than comparable beats.

These cans are a tad on the expensive side but worth it