I feel like I'm in the same predicament. I have a Windows desktop, iPad, 17" MBP, and am considering the MBA. I use the iPad for college textbooks, quick internet browsing, and task keeping. My 17" MBP doesn't get a lot of use, except for when I'm working with pictures or am going somewhere I need a powerful mobile computer, such as gaming or working on a project for a while. When I'm home, the desktop gets the most use. But, the MBA could be used for mobile computing, and great for when I am on call for work. I currently use the iPad for on call, but it can be cumbersome to use where the MBA would be a great solution. If only work could buy the MBA but for now, my concern is too if a MBA would be overkill. I am a huge tech enthusiast and love having all the latest toys...which is my biggest issue