Looking between a 13" rMBP with i5 2.6GHZ, 8gig ram and 512 SSD. Or the 13" MBA i7 1.7GHz, 8gig ram and 512 SSD. They are both in the right price range. I am mostly interested in running Lightroom, PS, with some light video editing. Of course email, web etc... One other consideration is that I will be using this computer while traveling around the world using only one carry-on bag, so the 1/2 pound weight savings of the MBA is a consideration. Basically is the extra 1/2 pound of rMBP worth it? will the i5 rMBP with its higher clock speed grind through photos faster than the i7 MBA? The 11" MBA is not a consideration as I will need the extra screen room of the 13" for assorted other software. Thanks all!