Droid Sans Mono makes for a great programming font. It’s got a bit of flair, 
  and stands out among the other monospace fonts I’ve listed, and its only 
  real flaw is the lack of a slashed zero.

I use Droid Sans Mono with slashed zeros on my Arch Linux box. I find that I can get it up to a rather large font size (I don't see well) and it still looks really good.

Download link http://www.cosmix.org/software/files/DroidSansMonoSlashed.zi...

Arch Linux AUR link: https://aur.archlinux.org/packages.php?ID=40418