I am thinking about replacing my old 2009 MBP 15" and would really go a size smaller and get the 13". I travel with it a lot and would enjoy a smaller version. Thinking of getting the MBP 13" or the Air. The thing that bothers me about the MBP and Air 13" is that they only come with a dual-core processor. Do you guys think it is worth waiting a few more months in the hope that Apple releases a quad core version? What are the odds of that? I know this is speculative, but hope to get some feedback. I am undecided and can't make up my mind..