I am in the market for a Macbook Pro. I could purchase a refurbished online for $1449 at Apple's website or a brand new one for $1999. First Question: Are the improvements/changes enough to justify the price difference? Second Question: If you have any experience with purchasing a refurbished computer from Apple's website could you tell me if you've been happy with the quality of the computer? Also, did it take a long time for the computer to ship? Thanks for any advice.