optimal resolution for a 19in monitor is 1280x1024 as manufacturer says. It does look the best picture wise, but then again you have really big bars at the end of the screen and makes the picture feel squished. I never use 1280x1024 unless I have no other choice other than 1024x768. I also don't use 1600x1200 on my monitor because although it supports it at 85Hz, text, or fine detail doesn't have uniform detail within that letter or detail. I see that as artifacts and thus I do not go past 1280x1024. For my desktop I use 1280x960 on my 21".
I have mine setup with refresh rate overrides for all 4:3 resolutions starting from 800x600 up to 1280x960 and 1280x1024- just in case. I also have some 16:9 resolutions set up for experimentation, that's besides the point. With those resolutions you need to choose a refresh rate. If you have an Nvidia card, you can customize your refresh rates much better than the ATI cards. With this type of customization where you can customize a refresh rate for each resolution, I found out the max refresh rate for the chosen resolution and set the second highest refresh rate. Max refresh rate looks a little blurry. You'll want to give it a bit of headroom. If you don't have amazing options like Nvidia and have an ATI card where you can force one refresh rate for all resolutions, then I would open up Word to a blank page and stick my eyes as close to the screen as possible. not for too long though. if you notice flickering, then move up the refresh rate. start at the lowest refresh rate. Do this until you do not notice flickering. That is your optimal refresh rate and use that for the resolutions you can. I wouldn't go under that.
native resolution on CRTs is the maximum resolution. But this only works at 60Hz, so forget that. Going away from native resolution doesn't noticeably degrade image quality.
Could you elaborate by providing some optimal resolutions for dot pitches of say 0.24, 0.25, and 0.28?
Dot pitch is never uniform across the screen and you can't tell which one the manufacturer is specifying.