These are the best headphones out on the market now! After trying Sennheisers, Bose, Etc. I must say these are the best regarding sound and build quality. Will never switch over to a different brand.

Although expensive, the Beats by Dre Pro are a well-built and quality pair of headphones. They cancel out sound better than the Beats by Dre Studio, and I experience zero sound leakage. They are constructed out of aluminum, and their hefty weight was uncomfortable until I got used to them.

These headphones produce some of the most amazing qualitative sound you can find in this price range. Not to mention how comfortable they are.
Its a nice feature to be able to plug-in on either earphone and rotate off either headphone independently. When I am monitoring in the studio I usually need to keep an ear free while talking to clients. I am very happy with these headphones and highly recommend them to any serious audio professional and audiophile.