I think going chronologically makes the most sense. So let's go with What God Hath Wrought, and consider Eric Foner's Reconstruction as a next. Ideally we'd then do The Warmth Of Other Suns, and then come back to the Civil War.
I'm really itching to read about Robert E. Lee. It might even be nice to do Grant's memoir.
Shall we start talking in November? How does that strike everyone?