I am having a really hard time debating this. Money is an option, but I don't want to regret making the wrong decision over a couple hundred bucks later on, especially when I plan on selling in 4 years and upgrading to a newer 2016 model. I am eligible for a student discount which helps. My questions: 1) Is the performance leap from the new I5 to the new I7 to the new quad core I7 considerable? In other words, when running multiple applications, will I see a significant practical difference if I was on a new I5 compared to the new entry level 15.4" model? I understand all models have the new ivy bridge processors. (I must note that if I do go with the I5, I will upgrade the ram to 8GB) 2) If processor speed is basically a practical wash, is the new HD 4000 sufficient enough to do very light video editing / hd video viewing? Or would I need the extra graphics offered by the 15.4" model. 3) Finally, if cpu speed isn't significantly different, and the HD 4000 graphics does just fine, do you think the increased resolution in the 15.4" model justifies the huge price increase? Thanks for the input guys. I'm an apple noob trying to get some input before I lay down some cash on my first macbook.