I'll put in another vote for Throckmorton, and also Bonni Benrubi, who actually cares about showing analog photography. They're within a block or two of each other. B&H is great for buying supplies, but do check out Lens & Repro if you want to see a little camera museum along with piles and piles of really cool camera gear. They have a display case that fills the better part of a wall full of rare and unique cameras including special edition Rolleis, Leicas and Hasselblads. They also have tons of original prints on the walls from many of the great photographers of the 20th century.