Welcome to Basenotes, Glenn!
One that I have bought recently and really like is First Love by Van Cleef & Arpels. If she really liked the Ralph Lauren Glamourous she might like another of his called Love, Ralph Lauren. Other favorites would be 24 Faubourg by Hermes, Hypnotic Poison or Miss Dior Cherie both by Dior, Idylle by Guerlain, Elle or Young, Sexy, Lovely both by Yves Saint Laurent, Coco Mademoiselle by Chanel.
I'm sure you'll get alot of suggestions. I hope you find the perfect one for your girlfriend!