I just got a Samsung 2333sw monitor. When I plug into my 128GB SSD Rev B, it automatically uses the samsung as 2nd monitor. The screen is fully covered. But when I select mirror (using the samsung as primary screen and turned the brightness of my MBA to the lowest), the samsung LCD picture is not clear and the screen is like 4:3. Does this means that MBA can't support ext LCD as primary screen at 1080 resolution? How about for those who has the new Apple 24" Cinema display? Can you use that as primary screen?