Hello, I am in doubt concerning this problem: if I connect my MacBook Pro Retina 13 inch to an external display of 27 inch with a resolution of 1920x1200, will the text and images and everything as a whole look as sharp and as clear as it does on my MacBook? Or is it necessary to buy an external display which has a high resolution as the MacBook? What happens if I connect it to a 24 inch display? And the last question, how is it recommended to connect it to the display to get the best out of it? HDMI cable or DVI? Thanks!