I am planning on purchasing a Macbook Pro for relatively extensive use of Final Cut Pro (HD video) along with possibly some Motion work and video transcoding. In addition I will be using it for photo editing and web editing. I don't plan on using it for any high-end 3D gaming. I will be purchasing a $200 24" external monitor to use most of the time along with external keyboard and mouse (so MBP screen size isn't an issue), but I need the portability and don't have the funds to purchase an additional dedicated desktop yet. I am having trouble deciding between the 13" and the 15", mainly due to conflicting opinions I've been hearing over the importance of a dedicated graphics card for video editing. Salespeople at the Apple store tell me it's important and I should get the 15". Research online yielded heated forum arguments over whether it really makes a difference or not (for example: http://forums.macrumors.com/showthread.php?t=718284). The price difference is quite significant though at the configurations I picked ($765) so I am seeking advice here for whether people think the cost difference is really justified for my needs. Note that both configurations include 4GB of RAM, smallest hard drive option (i've got external drives) and AppleCare protection. Pricing with education discount after tax: 13" 2.26GHz - $1520 15" 2.66GHz w/9600M GT 256MB - $2285 Is there a real difference in video editing performance and if so, is it really worth an extra $765? Or is there a better option that I'm not considering?