I've been facing an annoying problem for quite some years. Since Microsoft introduced the so called Cleartype tech around Vista, IE8 era. The bold display of Courier New font has been terrible. That is, it is very hard to visually tell bold and non-bold text apart.
It is not that I don't like Cleartype who makes many font display beautiful. You can see quite some comparison here: http://www.codeproject.com/Articles/30040/Font-Survey-42-of-the-Best-Monospaced-Programming . That is, I do not intend to turn off Cleartype system wide.
Anyway, Cleartype seems to introduce the same problem to many monospaced(fixed-width) fonts like Courier New.
So, is there any good alternative to Courier New?
BTW: Courier New on Mac OS X 10.6 Safari(with font ditherring) just looks great.