Hi all, I'm looking for a laptop which I hope to use often to edit HD video. The fact that I travel a lot ruled out the heavy Macbook Pros and also the 15" Retina (I realise the lack of dedicated graphics card & screenspace is an issue but I don't have much choice). I've recently been considering upgrading the Air with 8GB RAM, 256GB storage and the 1.7GHz Dual-Core Intel Core i7 (Turbo Boost up to 3.3GHz) processor. After that, though, there's only about $100 difference between that and a similar Retina, albeit with the 2.6GHz Dual-core Intel Core i5 (Turbo Boost up to 3.2GHz) processor. I've been cruising threads for a while and not many offer much guidance in regard to the differences between these two particular dual-core processors; i.e., whether the slower i7 will be better or worse than the faster i5, or which of the GHz speeds mentioned are most important. I don't know much about processors and have been agonizing over which to choose. If they were more or less the same I might lean toward the retina as there's not much weight difference and I'd pay the extra cash for better resolution. I'd really appreciate any input on the issue or any extra advice generally. Thanks.