Hi, I am looking to buy one of these, with no extras. It will be my first mac laptop, and currently own a 2008 Sony Vista laptop. I really do not know which one of the two to go for. Hard Drive space is not a problem, I can cope with the smaller one easily, it's the GHz and Turbo boost that I am unsure about as regards to their effects I may notice (or not). So would the more expensive laptop noticeable for example start u and shut down faster? Would apps and software open noticeably faster? Would the Internet be faster? Basically would I notice any difference at all to justify the extra £500+? I will be using it for general internet, Apple TV, streaming live sports, using Office 2011 and playing the odd game, but I don't play the newer ones, so for example Roller Coaster Tycoon 3. Thanks in advance! P.S. What would one need to be doing to actually notice the difference in performance if my needs did not make any difference?