Hello, Im looking to buy the new Macbookpro Retina 15" for school/daily use. Im studying mechanical engineering, so I need programs like Autodesk Inventor and Autocad. I also play some games like Football manager, Guildwars 2 on my pc now, but im looking for a Mac now. Im also playing other games, but not that high demanding ones, I have a Xbox360 for that So my main question is, should the standard 15" MBP Retina do just fine, or is a upgrade to 16gb usefull. And is 2,4 Ghz or is the 2,7 Ghz just better? If anyone has some information for me, Thanks!