Lenovo ThinkPad laptops have long been a favorite of business users on the go, and for good reason. They have a long history of durability and solid performance, and their keyboards are arguably the best on the planet. The new Lenovo ThinkPad X240 has the distinction of being the thinnest and lightest X-series laptop to date but it is still MIL-SPEC tough and offers solid Core i5 computing power as well as Lenovo's new Power Bridge battery technology, which gave us over 15 hours of battery life. Like most ThinkPads, the X240 isn't exactly cheap, and its 12.5-inch touch screen is relatively low res, but this well-built ultrabook rocks just the same.