I am a recent switcher to the MBP. I used to use a high powered i5 machine with dual monitors with Windows 8. I have decided to make the switch because I never used to play any games, or do anything that'll require me to push the limits of the machine. It's possible that I might be going back to school too, so I decided I need a laptop. I have acquired a 15" 2009 MBP from my brother, but in all honesty I perhaps would have preferred the 13" due to the portability. My currents specs are Core2Duo with 4GB RAM. By the processor alone, you can see that this is a dated machine - I don't know how well it handles the daily tasks. It also has 10.5 on here for the OS. I've thought of selling this and either getting a newer (or refurbished) 15" or 13". I like the 13" for its size, but I don't know how much the small screen will bother me on long journeys. At home I intend to hook it up to a 22" monitor (I'd do the same if I get a 15" too). So, do you think I should sell this model and futurerproof myself for the next 3 years+ - what would you suggest when advising someone of portability between the two sizes?