Hi,
I just purchased two Dell U2713H's! They are a great upgrade from my previous ZR2740W IPS display. However I do have a few concerns. I'm not 100% sure if these displays are brand new, or from an authentic reseller. They were listed on Amazon as a Registered partner and the displays are November 2013 build Rev. A06.
The two monitors do have quite varying calibration, and the color / brightness uniformity on one of them isn't very good.. over -30cd different at the bottom from center at 120 and 160 nits
I'm only concerned because I notice for those that order direct from dell they have their serial number and rev number on the outside of the box. The calibration reports do match up with the serial #'s on the physical monitor though.