I'll be in Manhattan for more than a week come September, visiting from LA. I want the ultimate New York City dining experience, from little delis to dim sum in Chinatown to the best pizzas to all-you-can-eat sashimi to a big chunk of steak.
I'm particularly interested in what Manhattan has to offer that I can't get elsewhere, particularly in LA. Budget isn't an entirely huge issue, but I don't care to spend a fortune.
Any suggestions would be helpful, even including what types of food that are unique to NYC, and specific restaurants of course! I'll be staying near Union Square, but will travel for food!