Hi all, I just bought a MacBook Air 11" with C2D 1.4 ghz, 2gb ram and 64 GB of ssd. Firstly i want to say that i have a MBP Early 2011(Core i7, 8GB RAM, 128 SSD) as main pc and this MBA is just for "simple" activies in university(writing texts, web browsing and music). So i want that this MBA do few things but to these things very well(no lag, smooth etc.) Said these things, what is the best OS for me? Snow Leopard, Lion, Mountain Lion or even Mavericks(that a lot of users said that run better than Lion/ML)? P.S: extra question: i paid it 446 dollars, its a good price or no? Thanks in advance!