Hi Everyone, I'm going to purchase the new MacBook Air 13-inch : 128GB, but have some questions. Usage: 80-90% of the MacBooks use will be for surfing the web and managing my iTunes w/ iPhone. My iTunes has about 60 GB of songs housed in an external hard drive. Concern: When I surf the web, I tend to open about 8-10 tabs while running my iTunes. The thing I have experienced with PCs is they freeze up or lag when I try to do to much stuff, to quickly. Then I get the programs are not responding error. Question: To avoid freezing/lag and having programs not respond, do I need to upgrade my processor to 1.7 (1.3 Standard) or Ram to 8 GB (4 GB standard) Thanks for your help!!!