I would say Hermes Dior Givenchy Dolce &Gabanna Prada Gucci Versace Louis Vuitton Hermes is definitely the top, nothing can compete with the Birkin. And labels like Dior and Hermes can't be bought online at all really so I would consider them more exclusive. Dior and Givenchy are almost exclusively couture so they are higher. Prada is mainly couture, but more trendy, not quite as classic. Gucci, Versace, and especially LV have been lowered by tacky celebrities (Snooki) and soccer moms.
I don't actually personally know a single person who wears any of those brands... I suggest these brands: Hollister Abercrombie &Fitch Aeropostale Urban Outfitters Victoria's Secret Hot Topic Pac Sun Fresh Tops etc.