Monitors just ain't what they used to be. I remember a time when all I need to know is that if a monitor supports 1024 by 768 resolution, it's good. If it stayed only in 800 by 600, then it's bad.
Times have changed! With HD, 1080P, DVI, HDMI, and what have you, it can be confusing. The Real Deal podcast from CNET has an excellent episode on monitors. CNET's monitor expert, Eric Franklin, is on this episode to talk about monitors and what you need to know about modern monitors.
If you are thinking of buying a TV that you might want to connect up to your CPU or laptop, check it out as well.