I think J. Crew, Express, and Bath & Body Works were mentioned as well.
It did seem like the stores mentioned were kind of random. J. Crew doesn't seem like a teenage-oriented brand, for one...
Abercrombie and Nordstrom were also mentioned.
I'm into fashion and I LOVE J.Crew, so it depends on what you like, your price range, etc.
Bebe and Express are the big ones that Rachel likes. I don't know how they were in the 90's, but they're really not all that great. It's like "sexy work clothes."
I feel like KA was never into fashion and it was hard for her to create a character that was, so she just mentioned stores that she thought a teenager would like.
It all depends on whether or not Rachel is into shopping or fashion. There's a BIG difference. Most teenage girls like shopping, but fashion involves following high street (runway shows, editorials, etc.) and low street (vintage, thrifting, street style) which most teenagers don't care about.