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ASUS ZenBook UX31E: another early Ultrabook
This PC was another early entrant in the Ultrabook category. When I picked it up in February 2012, it was running Windows 7. I had no trouble installing a succession of Windows 8 preview releases on it, and it upgraded without incident to the RTM build of Windows 8.
There were other, cheaper Ultrabooks I could have chosen at the time. I picked this one because it offered a screen resolution of 1600x900, which was practically unheard of in its roughly $1000 price range at the time. Its keyboard was occasionally balky, and every time I covered an event in a dimly lit hall I wished the keyboard was backlit. It has since been replaced with a new, touchscreen-equipped Acer notebook.