As soon as someone turns up some real unicorn tears, they'll surely use them to make a Mac productivity application that handles everything for us—from idea to shipped product. You can keep longing for that day, or you can read David Sparks's excellent post on OPML, the lingua franca of several great Mac applications.
What you need is a standard that allows you to transfer your human thoughts between multiple digital applications. Specifically, a way to get your thoughts, outline, and mind map ported directly into your word tools. This is exactly what OPML does and THAT is what makes it awesome.
Use the right tool for the job at each step, and profit.