I have the last model Mac Air. I looked at the new models, and though they are faster, haven't bought one because the upgrade doesn't seem important enough. (I only use mine for text-based work, and web browsing, with some peeking at photographs, while traveling.) One thing to keep in mind about traveling with a Mac Air is that while they are very small and light, you also have to take the power supply and cord, which are not small and light. I'd say that the Mac Air's power supply is one of the larger and heavier ones on the market. I have purchased a special nylon bag in which to carry mine, because of the size and the tangle potential. To keep the Mac Air small, Apple also has somewhat crippled it in terms of extensions. Mine (the older version) has only one USB port. The new one has two -- but I've seen reviews that say the two ports are so close together that they will not accept some brands of thumb drives side-by-side, because the drives are too wide. What this means in practice, for me, with my older version, is that I have to carry a USB port extender, which is even more "stuff." I have Photoshop on mine (CS4) but never use it, because the screen isn't good enough and processing is slow. I also have Lightroom, which I do use on it, and Lightroom seems to me much more compatible with this small computer, though, of course, the function is much more limited. The best use of the Air, IMHO, is as a web browser while traveling, and possibly for photo storage. But if you're involved in photography, you'll need another computer. The higher-end MacBook Pros can serve both as travel computers and as powerful desktop-replacements, but they weigh about three times as much, and traveling with them is just that much more weight. I have found that use of a lightweight roll-aboard makes a considerable difference in moving the weight around, if you primarily travel to places with hard surfaces -- airports, downtown hotels, etc.