Just picked up a SP3 i5 128 gig. So far so good, however I am wondering if I need to match the processor of the computer I am coming from. I have been using a Macbook Air mid-2011 i7 laptop. The computer is fast and smooth. Should I exchange my i5 SP3 to match the processing power of my Mac or will I not notice a difference? Thanks. I will be doing heavy Outlook, PowerPoint, Word, Excel plus a ton of PDF viewing and markup.