Hi, I have a 2010 Macbook air base model (1.4 GHz C2D/2GB) and am wondering if I should upgrade to Mountain Lion next month. I like the new features in Mountain Lion but I am thinking I might be better off sticking with Snow Leopard because of my specs. I mainly use my Macbook Air for internet browsing, streaming video (netflix/youtube), word processing, and listening to music through iTunes. How will performance, battery life, heat and fan noise be affected if I upgrade to Mountain Lion? Thanks for your help!