Buon Italia

This Chelsea Market source for all things Italian — oils, vinegar, cheeses, charcuterie, pastas (fresh, frozen and dried), grains, spices, etc. — is considered worth going out of the way for given its excellent selection and reasonable prices.  The peckish head to the prepared foods café in back, or grab a coffee and a baked treat at the front espresso bar.  They also sell caviar (domestic, Russian and Iranian) and truffles.