Have you looked at Myriad Pro? http://store.adobe.com/type/browser/P/P_1706.jhtml;store It's one of the most readable sans faces there is, of low contrast so it's suitable for web images. Being OpenType you can install the same files on Macs and PCs, and you have all the extra glyphs, ligatures, old style figures and small caps of the OpenType library. Adobe's standard licence is for installation on 5 machines at the same location. It's Adobe's house sans face, examples all over their website. Pauline Pauline's Views of France: http://www.pauline-caldwell.com/france/