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Thanks for all your replies. Are there any monitors that are cheaper, maybe a CRT with 1600x 1200 res?

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Check out OfficeMax. They have 19" StarLogic flat CRT's for $159. They are 1600x1200 and have a decent refresh rate. You should be able to pick them up locally, but here's a link:

19" CRT

I have had 2 of these for awhile. My sessions usually last anywhere from 4-8 hours and I have had zero problems with eyestrain.