I'm having a hard time deciding which refurb to go with. I see a lot excitement over the I7 quad processor, but is this really the best choice for everyone? In other words, for what kind of users would the I5 be the best fit for, versus the I7? My thinking is I7 for intense gamers, transcoders, developers, video editing, process-heavy applications. I5 for everyday browsing, iTunes entertainment, email, photo library, word processing, etc. Am I correct? If true, wouldn't the I7 be a waste of money for the latter group? Or should the I7 be the case for everyone for future-proofing, regardless of computing needs?