My husband and I find it likely that we will be in Boston for his birthday. As he is from the Boston area and we're often there for special occassions, we've been to many of the major Boston "special occassion"/fancy restaurants (e.g., Oak Room, Grill 23, Aujourd'hui, Federalist). I'm often pretty disappointed by these experiences -- a lot of show but not always great service or food.
We're looking for something a little more casual/smaller but with fantastic food nonetheless. My mother-in-law now lives in Amesbury and will be joining us, so we'd even be up for a suburban place if there are birthday-worthy options. Price is not really a concern as long as the food's good; a mediocre place with expensive prices always makes all of us mad!