I have to just post this one out there, I recently had an exceptional dinner at 80 Thoreau in Concord. I had the Saffron Tagliatelle w/ Braised rabbit.
Curious, since I am really only familiar with the towns off the T - where else to CHs go for atmosphere, great drinks (homemade tonic!?), and a unique view. Sitting next to the Commuter Rail adds a very unique and fun experience.