I am a graphic designer and I also maintain and design web pages. Currently I use a 24" imac that is getting long in the tooth and was thinking about replacing it with something more portable. I LOVE everything about the MBA13. The only thing that scares me is the screen size. To anyone in design, do you use a MBA without an external monitor to do professional work? Are there any pros and cons you can list upon doing so? Are you satisfied or do you always feel like you want/need more?