I currently have a 2010 MBP and I was looking for a light weight options when I do a lot of traveling. I need to use the computer for the normal browsing and light iOS and OSX development. Most of the location I visit will have an external monitor for me to use. I am thinking about getting the 11 inch MBA just for the size. I will pay to get the upgraded CPU, Memory, and the 256 HD. It appears that the only differences between the two computers are the size, screen size, and SD port am I missing anything else important?