Hi Everyone, I'm looking to get a new MBPR in the next month or so but I'm having trouble identifying the real life differences between some of the numbers I'm seeing. My last computer was a late 2009 iMac and obviously the specs have changed a bit since then. This new 13-inch MBPR will be my only computer, and I'll use it primarily for school, but I'm interested in playing a few games on it as well and thats really where my questions are coming from: What are the differences between the processor speeds offered? Will it make a marked difference in terms of gaming if I were to get the best speed available? What about RAM? I was thinking to upgrade to 8GB, but what impact will that have, and again, would an upgrade to 16GB make a life changing difference? What other suggestions/advice might you give me based on what I'm looking for? Thanks in advance for your help!