With the new MacBook Air the MacBook line is stable for the next few months, making this a good time to buy a new MacBook. But which one is right for you? The MacBook is the lightest, the MacBook Air is the least expensive and good middle-ground, and the MacBook Pro is the most powerful with several major options. There are several factors that can help you decide. You should always make a trip to a store to compare them for yourself as there is no substitute for hands-on experience.