There was another thread on RPG.net about what products to buy. I half jokingly said I wanted to make a flow-chart to help people out. And then less-jokingly, I just did. So here's what I came up with. I'd love some feedback.
You may note that neither the GM's Vault nor the Player's Vault is listed as I A) don't have them, and B) don't really understand what niche they serve. My goal isn't necessarily to be complete or thorough, but to show a pretty clear answer to where to start.

