For the best ethnic food (Chinese, Thai, Oaxacan, Mexican and Japanese, etc), you'll need to travel out of the area. In the area, I'd check out Josie for her new American-French and stuff with game, Mori Sushi for aesthetic high end sushi, Chinois on Main for Puck's take on Chinese, Ivy at the Shore because it has a real vacation feel about it, and--though I haven't been--the renowned burgers at Father's Office in the evening.