Manhattan – Upper East Side
220 E 57th St between Second and Third Aves
If it's a high-end wall system you're after, the consultants at this design shop are what you need. The Lecco unit (starting around $1,200) has three different types of wood finish. From there, you can continue choosing, right down to the exact width of the shelf. Stop by the Soho store right before Thanksgiving, when new shelving line Modena ($400--$600) will make its in-store debut; it's designed specifically for smaller studio spaces.
Find more shops at Time Out New York.