We were going to replace my wife's 2010 27" iMac with the new model but we've been contemplating a MB Air for her also. We thought of a 27" TB CD in addition to a 13" Air but the big hold up was the USB Ethernet adapter. She has the need to move a lot of data back and forth to our server. GB Ethernet is essential. I was thinking why doesn't Apple have a TB based Gigabit controller for the MB Air, then finding out its built into the new 27" TB unit available. Anyone using one as their network connection and how is the speed? I'm sure this has been asked but will an Air drive 2 daisy chained 27" monitors?