Hi, welcome to basenotes! It sounds like you will be having an amazing trip! I would suggest Chanels #5 Eau Premiere or Coco, both wonderful scents! There are so many excellent stores in New York, I would go to Barneys for Frederic Malle, Neiman Marcus and Saks Fifth Avenue. Also, I'd love to go to Bond #9 of NY and the Guerlain boutique at Bergdorf Goodman. I hope you have a wonderful trip!