I am thinking about upgrading from my MBA Rev A which I've had for nearly 5 years. This is by far the longest I've had a CPU, and it is still filling my needs fairly well. I do wish that it ran vids better and didn't run so hot, but I've never had such a reliable computer. So I'm thinking about upgrading and have some questions. The first is about speed. I'm assuming I'll get a big bump in speed. Can anyone give me an idea how much faster the current MBA is than my old Rev A? Configuration: I'm going with the 13" and 128GB SSD. Coming from my 64GB SSD, 128GBs will seem huge. I plan to use an SD drive for backup and additional storage. The question is RAM: I am leaning toward getting the 8GB upgrade. I use the MBA mostly for Internet, music, video, email etc. However this is my "road" computer, so from time to time I have a need to use Dreamweaver, Photoshop, InDesign and VM Fusion. Is 4GB good enough or will I do better with 8? Lastly, I am hoping the new MBA runs MUCH cooler, without the attendant fan noise. True? Thanks for your help!