I bought a Thunderbolt Display to go with my 2012 MBA 13". It was such a perfect setup...I put the MBA on a backpack behind the Thunderbolt Display. One issue I had that I would advise though, is that if you use the MBA with the Thunderbolt Display and the MBA is in clamshell mode, it will reduce the wifi performance. I was experiencing significant reductions in wifi performance and after hours of apple tech support they said keeping the MBA closed will reduce the wifi performance because of the design of the wifi antennae being behind the display. When the MBA is closed it creates an aluminum "case" that the antennae is trying to penetrate through, rather than being naturally exposed when the MBA is open. Just a word of caution...