I'm thinking about purchasing a new computer. The light weight of the new Macbook line is very appealing to me, but I'm wondering how to assess the specs on it in relation to my current computer in terms of day to day use. I've currently got a mid 2012 13" Macbook Pro with a 2.9 ghz i7 processor, 8gb ram, and an HDD drive. I'm not very knowledgeable about processor speeds, but with the numeric difference in the processors, it feels like going to a 1.1-1.3 processor would be a very significant slow down. On the other hand, it's a newer processor and I don't know how comparable the numbers are by themselves. Plus, the new Macbook would be a switch to a solid state hard drive, which I've heard are much faster than what I current have. So, I'm just not sure about how to weigh those specs (difference in processor and hard drive type). As long as day to day performance would be the same (or better, of course) as my current computer, I'd be very happy to lose the extra weight and gain a retina screen. How would you guess I'd find the performance on a Macbook (I'd probably go with a 1.3 to be "safe") in relation to my current Mac? Slower? About the same? Faster? For reference, my current uses include writing long word documents (book length projects), sometimes with line drawings of images, creating and displaying powerpoint files, reading PDFs, music listening, occasional light photo editing, internet, and email. My current computer has been entirely fast enough for me and I've been pleased with it except for the weight. Any help in comparing the two?