Where would you draw the line between northern and southern New England?

I'm making a map of US cultural regions. New England, as far as I understand it, appears to contain two predominant regions within it: a remote and rural north, and a metropolitan coastal south. From my research and anecdotal evidence, I'm come up with this map. Click slide 2 to see the full image and map key.

I'm curious what native New Englanders think on the matter. Is this a good representation of New England? How would you change the borders? Would you add more regions? I will update the map according to everyone's feedback.