External Display for 1680x1050 Thinkpad

[rknt50a]

This should be in the really stupid question category, but I need some help.

I'm looking at Thinkvision displays and need one to go with my 1680x1050 Thinkpad. Use will be general office productivity and system development. The reason for the external display is to try to help with some eye problems that I've been having when working for long periods off the Thinkpad itself.

I want a display with a height adjustment.

L200P seems to be a good fit for my resolution.

Is there any reason why L220X would be better? Does a higher resolution display turn out looking worse when the Thinkpad has a lower resolution?

Thanks for any guidance. My goal is crisp, clear, and easy on the eyes.