Hello Everyone, My 2008 1st Gen MBA is finally crapping out on me. Started with Kernal panics a couple weeks ago, Tried to clean it up, but now the sound won't work (greyed out) and Itunes won't play music or video (stays at 0:00). I think the logic board is going out again. I've already had it refurbished once in early 2010 through Apple, so I'm ready to upgrade! I am planning on the 11", 4GB model, as I am traveling more for work. I am wondering if I should go with the i5 or upgrade to the i7. I just use this machine for streaming video, Itunes, word, excel, and basic web surfing (NYT, Wash Post, Insideline, CNET etc.... ) Will I notice a huge difference between the i5 and the i7? Sorry for the elementary question, I just wanted to get some feedback.