So I am considering buying a new 15.4 MPB to replace my current 17" MBP. I am a graphic designer so I don't want to loose resolution so I am thinking I might buy a good external monitor that has a high resolution for work. I read somewhere that you can't output a resolution higher then what your laptop has, but that doesn't make sense. If that was the case why would people buy bigger better external monitors? Is there some sort of adapter you need to buy to make this work? THANKS!