Updated models with AMD graphics options expected in early 2017.
Cinema Display Price Drops [Updated]
The new displays can be found at Apple's online Apple Store.
Update: MacForum member BlizzardBomb notes that the specifications for the 20 and 23" displays have been bumped. The 20" display now has a brightness of 300 cd/m2 (up from 250 cd/m2), and the 23" display has a brightness of 400 cd/m2 (up from 270 cd/m2). Both models also now feature 700:1 contrast ratios (both up from 400:1). The 30" display remains at 400 cd/m2 and a 700:1 contrast ratio.