For our LaTeX templates, I'm looking for a font that is available in a standard installation of Microsoft Word on Windows (and, if possible, also OS X). Currently, we're using Times, but this seems to be a poor choice.
The reason for this is that we want to have our documents look similarly irrespective of the tools used to create them. The Word users shouldn't have to install any fonts. The font doesn't have to be completely identical, but comparable.
I know I can use XeLaTeX to import any TrueType/OpenType font I need, but I'm worried about math mode (which has to be available, too).
Which font combination for Word/LaTeX would you suggest to obtain similarly looking documents on both systems?