Franck Namani sells the most luxurious clothes in Paris. They are elegantly crafted using the finest materials, and hand made in extremely low quantities - only four of each item in each size (two for the two stores in Paris, one for London and one for Geneva). Unlike Brioni, Zegna and Loro Piana, the fit is consistent. If you wear a size 50, all items in that size will fit you perfectly. This allows the store to implement a "Dressing Room Concept" where each room is devoted to a particular chest size (size 50 shown).
In Paris, the store at 4 rue Marbeuf is by far my favorite. Michel, in menswear, has a great eye for color and style. David, in the women's section, is always fun to work with.