If you spend any significant time writing or reading code you know that the Font is of real importance to keep your eyes from burning. Microsoft has a new font specifically designed for use in programming environments. The font is Consolas and it is included with Windows Vista. This font is superior to any font I know of, but until now it was only available in Vista.
In order to get full benefit of this font, you should have your graphics settings set to use ClearType.
Open the display settings and chose "Effects…" from the Appearance tab.
Let me know after 12 hours of coding if it helped or not.