We've exhausted all the usual suspects but cannot get any font to display in our pages that is clean and small but readable like yours.

The font I use is Verdana. Because it is a sans serif font, is a good choice for website design. I use it a lot. One thing to be careful with when picking fonts for web publishing is that not all fonts are browser safe. There are only a handful that are pretty much installed on everyone's computer, such as Arial, Times New Roman, Courier New, Georgia, Verdana, and Geneva. Of course, the fonts installed on Macintosh computers are not the same as the PC, which is why you should list alternative fonts after your preferred font—just in case. For example, if you were going to use Arial, you would also include Helvetica (Mac version) and sans serif in your font tag. Fancy fonts are best left for graphic images. I do not recommend relying on non-browser safe fonts for page layout / typography as the end result may prove embarrassing.