I noticed that Verdana 14px looks good, while Verdana 18px does not.

Consolas 18px looks a bit better than Consolas 14px.

Consolas is similar but simply better than Courier New so I will prefer it over "monospace" although it seems Consolas is not widely supported.

Oh, monospace is Consolas on my system already, but the tilde stylesheet I used specifies Courier New. All the more reason to be rid of it...