The headline pretty much covers it. I am looking to buy a new MBP, and trying to decide which to buy, either the 17 with the HD res screen or the 15 with an ext monitor with HD res screen. It will be mostly used for photo and video editing + internet research and database management. At this point, I don't know whether I will be using it on the road or in the office more. I think I would prefer to do most of it on the road and at home in the evening, although the prospect of a large monitor would cool as well. How comfortable is it working on the 17in screen vs working on a large ext monitor?