One warning though, don't get a very small monitor and run the highest resolutions possible the image will be to small to view for a long period of time. You should be able to get all of the resolutions below this too though. However all of these resolutions could be limited by your video card. Refresh Rates These are important. A low refresh rate means you will get a headache or eye strain by staring at the screen for over 30 minutes.
Refresh rates vary between resolution and the higher the rate the better.
Anything above 72 Hz is supposed to not cause eye strain, but you will have to be the judge of that. This is the space between two pixels. Lately there have become a thousand different ways to quote this. Don't worry too much here. It is nice to have a low dot pitch, but the numbers are deceiving.