Use PDF. I've always thought it was a rude and bad habit to send Word files to someone when all the recipient needs is the ability to read and/or print the document. I produce reports for a living and all my clients get PDF files of our work product. Not only does nobody complain, this way the report looks the way we intended it to look and is not dependent on variables we can't control on the other end. The bottom line is: if you care about the quality of your work product, use PDF. If somebody needs your text for inclusion in another document, then export it as a Word doc (if they insist), or better yet, as an RTF file, which strips out most of the formatting.