Looking for Deli, any suggestions?

Maine native here.

I'm planning a birthday trip for my dad who grew up in Brookline and still misses deli food. He now lives out of state. The area he lives has no deli / kosher restaurants.

We are going to be in the area of Boston, Taunton, Brookline, and Framingham. Any local knowledge on great delis in those area would be greatly appreciated. No specific kosher requirements. What's your favorite deli?