Pay attention to other ergonomic factors, not just the monitor. While monitor resolution is nice, distance from the monitor and viewing angle are much more important. Keep at least an outsretched arm's distance from your eyes to the monitor. The top of the monitor screen (not the plastic!) should be level with your eyes or a little lower (but never higher). You should never feel strain in your neck or shoulders while typing.

In addition, a good chair (I like Aerons, you may like other brands), keyboard, keyboard tray, and mouse are relevant. The arms should bend at about 90 degrees at the elbows, and fall naturally to the side of the body. Your wrists should not hurt at the end of the day - if they do, examine your posture. The knees should be at about 90 degrees as well, with a solid comfortable stance. Finally, work out your back muscles when possible. They hold your back up all day. Beware of the common combination of strong stomach muscles (from sit-ups) and weaker, less exercised back muscles. You'll end up bent forward all day without realizing it.

Ted