After spending 35 hours researching 18 big, high-resolution monitors and testing six finalists, we recommend the 27-inch HP Z27n for most people. Its out-of-the-box measurements are phenomenal, it has a bevy of useful features including a USB 3.0 hub and a highly adjustable stand, and its slim bezels make the screen look even larger. It’s an excellent choice for anyone who wants to upgrade to a larger monitor. (If you’re looking for a 4K monitor, we have another guide for that.)