I am going to buy an inexpensive large screen, 1900X1200 res. to attach first to my Macbook Air and then to a newly ordered Pro. I just want to know that when you attach a 16/10 format screen will I get a full screen on the attached display or will I end up with either bars or a stretched image. I know that the new Macbook Pros are 16/9 but maybe that isn't relevant for the attache device. If it is relevant, then I will perhaps be forced to buy a Samsung 27" 16/9, which I would prefer not to do because I like the extra screen real estate in 16/10. A second issue is a 27.5" screen running at 1920X1200 vs 2500X..... Thanks for any advice.