I suggest Envy Code R [http://damieng.com/blog/2008/05/26/envy-code-r-preview-7-coding-font-released http://damieng.com/blog/2008/05/26/envy-code-r-preview-7-co

I suggest Envy Code R [http://damieng.com/blog/2008/05/26/envy-code-r-preview-7-coding-font-released http://damieng.com/blog/2008/05/26/envy-code-r-preview-7-cod...] It's not a bitmap font, but has a sharp, clean look.