I've decided that I'm buying a black macbook. I'm going to customize it slightly with a 250GB hard drive and I want iwork installed so I can't just walk into a store and pick it up. I can either order it on-line or go to my university's bookstore which has a computer section and order it there for them to customize. I'm wondering which one you'd all recommend. Which of the two options would arrive the fastest and which of these two options would result in the highest chance of it not being defective? I live in Canada so that would factor into the shipping time and whatnot.