What is the best font? Well you could use just a list of common fonts. It's really up to you, just make sure its readable, in your program zoom out a bit till the image is thumnail size. Can you read the font easily? There you go.
Just make sure to stay away from some of the more fancy decrorated fonts. Kinda keep it basic, like a sans-serif font. And also aim for bolder lettering, and a drop shadow or stroke.