We will be using Maddie. We're not looking for opinions on Maddie :)
Also, we're not looking for opinions on the spelling of Madelyn (this is the most popular in the US - I'm not American, but I'm just saying that it's a well established spelling). We want it to be obvious about the pronunciation we would like - Madeleine seems to be Mad-eh-len and Madeline seems to be Mad-eh-line, so that's what we have decided :)
Anyway, should we go for Madison or Madelyn as the BC name?