I use Pages, Keynote, and Numbers for all my documents. I have to export to or "Save Copy as" Word/PowerPoint/Excel. This creates a separate document. I'm doing something in which I send the person a Word document, they edit, send it back to me, and I have to keep adding to it. This can get hectic, not only because of the new file sent back to me, but because of the iWork/Office conversion. I currently have iWork '09. Do you recommend buying Microsoft Office as well? The last thing I want to do is buy Microsoft stuff, but this compatibility thing sometimes gets on my nerves. Any ideas for the organization of iWork files and Office files would be appreciated. Thanks.