Looking for the best prime rib in the Boston area - West is best. Mother-in-law insists on Prime Rib for dinner Christmas day - as you can see it is a democratic household.
A nice place for a mother-in-law looking for prime rib west of Boston is the Hartwell House in Lexington. Well-prepared large cut of prime rib, OK popovers, standard American sides, a piano tinkling over in the background, at a price consistent with food and service. Not novel, not sophisticated, but standard American food well-prepared in an ambience well-suited to the mother-in-law generation.
I got a beautiful standing prime rib roast at The Butcher Shop to cook for Christmas dinner a couple years ago, which they trimmed for me (cut through the chine) for easier preparation. Punishing prices, but very high quality.
I have been getting mine from Dewars for 20+ years. It is excellent and they will cut it however you want.
The Hartwell house in lexington is not in business anymore. The restaurant is now called Max Steins--this restaurant is great. I had the tenderloin it was excellent-im sure they also have a great prime rib. The atmosphere is also fantastic and they have a nice bar as well--give this place a try im sure you will enjoy it.