I'm looking to buy a 27" iMac. My usage will switch between light usage (browsing, office work, media consumption) and gaming. The one part of the configuration that I'm still unsure about is the CPU. I'm the type of person that likes to spend a whole bunch of money on a product and then stick to it for a long time (I'm talking at least five years). So if the i7 CPU offers any advantage over the i5 in terms of future-proofing my system I'm all in. But if it doesn't, and the i7 offers no advantage for gaming either, I might save myself 300 bucks. What would you advise me?