If anyone is into asian cuisine there is a little place called Woo Jung in Ayer that serves authentic Korean. Hands down the best I've ever had. It's not cheap but it's really great stuff.
You can't go wrong with the Capital Grille, Amazing filet mignon! Abe & Louie's is another favorite high end steak house in Boston. Atlantic fish or Legal Seafoods for a nice seafood dish, and the barking crab on the south boston waterfront (ft. point channel) for outdoor dining on crab legs, lobster and corn on the cob (seasonal)...There are so many great restaurants in the city, it's hard to go wrong. Avoid Assagio in the North End at all costs! (food poisoning)