I've been using Lucida Console as coding font for the past 15 years, due to its great readability at 9 pt (i.e. 12 pixels line height, though nowadays I add two additional pixels of line spacing). Still haven't found a better replacement.
I like Lucida Console, but I usually use Lucida Sans Typewriter[1] as my editor font. It's a bit taller and skinnier than Lucida Console, and works well with a line-height of about 1.2.
