Thanks for all the input! Guess I need to read signatures more carefully, too. :P TigerMom, I did try the Amira and was indeed a little too stretched out on it. (Which was a bummer, because it was on my short list prior to the test ride.) The Ruby and Amira rode like completely different animals.
Emily, I would really love to hear anything you can tell me about your BMC and how it handled, and why you think it's better than the Specialized. (Not trying to start a fight here, I promise!)
2011 Scott CX Team/Koobi Xenon
2005 Bike Friday NWT/Selle Royal Lookin
2001 Bianchi Giro/Terry Butterfly Ti
1970s Centurion Le Mans/Ancient waffle saddle