The MacBook Air is still one of the best laptops you can buy. Not only is it razor thin and light, but it offers excellent performance and battery life too. In its review, PCMag wrote that it got more than 10 hours of battery life out of the MacBook Air. It comes in 11 and 13-inch screen sizes, but if you plan on using it primarily for work we'd suggest the larger option.
One thing of note: Apple is reportedly going to release a new version of the MacBook Air in a few months. You may want to wait to see about that if you can afford to wait.
Price: Starts at $899