Helvetica  Suggested by fmontpetit 

or Swiss 721, or Nimbus Sans, or... You really amaze me sometimes, monpetit, when you solve fuzzy, not-so-well readable fonts, etc. I'd really like to have your "perception"

Thanks! And coming from you! I'm almost blushing.

Edit: You, on the other hand, have a very sharp eye for spotting the tiny differences. I wish I could do that, too.