The college has LCD screens and sometimes, especially during the longer classes, I'll get a headache that sticks around for the rest of the day. I don't know if it's the monitor or the actual class. I guess I'll have to do some independent research when school starts back up
I have had a big ass CRT for about 3 years and I think it's fine. I sit in front of it for hours at a time and it hasn't failed me yet.