If you want authentic -- and I mean authentic -- you should try 777. I believe it's under the Williamsburg Bridge...haven't been there in a decade. The place doubles as a catering hall for Chinatown weddings.
But what I really,really,REALLY want is the old fashioned N.Y.C. Cantonese Chinese restaurant food;which nolonmger exists.:-(
I want beef in oyster sauce,as it was made in Joyce's Macao;for instance.