Flo and i toured these shops a few weeks back...
King Fish Aquarium & Pet Supply : average selection of f/sw livestock lots of nano off-brand equipment which included some deep blue models in stock. They seem to be very big on plastic plants.
Reef Aquarium : average selection of f/sw livestock ; carries premium betta fish
Royal Aqua World : had dwarf shrimp, plants, more exotic FW livestock.
If you only had time to goto one shop int he area, i'd visit Royal Aqua as the other two don't seem to differentiate themselves from all of the common LFS in the NYC area. Near Reef Aquarium (on the same side of the street) there were a few interesting flower shops. Large pots of Pothos sold for $3 ea.