Birthday dinner in Old Montreal?
We just moved to Montreal and don't know the dining scene too well yet. My brother-in-law is in town for his birthday and has never been here! We'd like to take him somewhere quintessentially Montreal (no seafood, and he's not into foie gras or offal so I think Au Pied de Cochon is out). I was thinking somewhere in Old Montreal, moderately priced... Les Soeurs Grises was on my wishlist, but we'll also have a baby with us so that's out. The baby is young (3 months) so it doesn't have to be an especially kid-friendly place as he'll be in the car seat/stroller or in my arms the whole time anyway!
Restaurant Holder might fit your bill. It's a loud basserie setting with reasonable prices (not cheap though - mains are about $16-23). I have been there a number of times and have always been satisfied, though the last time I went was a while ago so maybe someone who has been recently can chime in here as well.
Old Montreal and moderately priced don't go in together (well, not if you also want good food, it seems only 2 of the 3 are possible at any given time...). Club Chasse et Peche is quintessentially Montreal, but a little more than moderately priced. Maybe Communion, with a terrasse on La commune.
However, if you were aiming for Les soeurs grises, then they probably are both overpriced for you. Taverne Gaspar (http://www.tavernegaspar.com) is probably close enough to Les Soeurs grises (well, without the home brewed beer). But food-wise, yes. Slightly more expensive, as it is closer to a restaurant than Les Soeurs Grises is, and trendier/closer to Place-Jacques Cartier.