I'm kind of spit-balling this post as my thoughts on this are not as definitive as I'd prefer they be. So, I'm going to kind of 'think' publicly here on my blog and hopefully this will start a conversation to help me sharpen some of the fuzzy bits of my thoughts.
See the end for a rough sketch I have in my mind.
I want to say that being an atheist is a particular instance of a general disposition I have. To this extent, it's important to me in the same way that knowing my home address is important to me. It's not important in and of itself, and it isn't a jumping off point for a line of reasoning. These things are the conclusion of an evaluation of the data available to me, and my most earnest attempt to model those data as honestly as I can. It is then a therefore statement, with the atheism/home address coming after the therefore and not before it.