La Spina in Davis is pretty much my new default. It's almost never crowded, and the food is quite good: it's very much a 'traditional red-sauce' kind of place, but it's well done; I think it's a bit better than Sagra, and the prices certainly make it a better deal.
Over the course of a couple of visits:
Gnocchi, which were very light and tender.
Napoletana sausage dish: the chef apparently has a particular place in the north end where she gets the sausage, and there's only so much of it. First time we tried, she'd sold out. 2nd time, we had it: worth the wait. It wasn't very spicy, which sort of surprised me, but that let the flavor of the pork shine through really well.
Eggplant involtini: I don't know how they get the ricotta to be so airy. Probably whipping it or something. Either way it was delicious. The involtini at Sagra are not as good. (Have you noticed that just about *every* restaurant in Davis Square now has involtini? Orleans, Mike's, Sagra, and La Spina, at least. I'm waiting for the Chinese takeout joint on College Ave to offer it.)
Slightly less traditional: A special eggplant app: they stuffed a half a small italian eggplant with scallops, shrimp, and squid, then topped that with panko and roasted it. Delicious.
The bartender there, (Steve?) is very knowledgeable about wine. He told us that he was studying for a Level 2 Sommelier certification exam in the near future.