Hi there, I'm planning to buy the new rMBP (15 inch) when it comes out (I hope soon!). I'm trying to figure out how much RAM I will be needing. Currently I have 3 GB in my 2007 Core 2 Duo MBP and sometimes I run out. I use the laptop for light Photoshop work, Bridge, webbrowsing, things like that. I guess in the current situation 4 GB of RAM would do, especially with a quick SSD. To make the laptop a bit futureproof I would choose the configuration with 8 GB, I think that would be sufficient for at least 3 years. However, since I hope to use the new rMBP for 6 or 7 years, like I did with the current one, I'm wondering if 8 GB will be enough at that time. I know Mavericks is supposed to be more RAM efficient but how RAM hungry will the OSX and the applications be after 5, 6 or 7 years? 10 years ago I thought 512 MB of RAM was pretty much, nowadays that's nothing! The upgrade to 16 GB will probably cost me about 200 euro's (the current pricelevel) which is not really a problem but I can use it for other nice things as well of course. I'd like to hear your ideas!