Hi all, I am looking into upgrading my current 17" mid 2010 MBP to a new Retina. However I keep going back and forth on the size of the computer. I really don't like how big and bulky my 17" is currently, but the screen size is very nice. I do travel with work and use my laptop on the plane so I was leaning towards the 13.3. Besides 1.7" added screen size are their any advantages of the 15" over the 13.3"? I know a lot of it is personal preference so what are your preferences?