I am a HUGE fan of the deep fried "sweet and sour" fish at an ordinary-but-chowishly-delicious little restaurant in NYC called Saigon Grill. It is amazing - an entire snapper (?) comes perfectly fried such that the skin provides a wonderful crispiness, and the flesh remains moist though not oily. It is lightly battered and smothered with a light brown sauce (and various vegetables) which is tangy, though not anything like the pink sweet-n-sour glop you get at Americanized places. The meat pulls off with just a slight pluck of chopsticks. No overcooked toughness.
Anyone know where I can find a close approximation in Boston?