Hey all, I am looking to buy one of the new 15-inch MBPs. I do some video editing and music production. Avid, FCP, Logic, etc. I was wondering if I were to get the 2.0ghz i7, how big of a difference in speed is that to the 2.2 or 2.3ghz i7? Is it a dramatic difference? Are there any actual speed tests with all three? If the 2.0ghz adequetly does the job, I'd love to save 500 bucks! Hope to hear your thoughths!