I don't know much about the Fly but I do know 10'6" Nalu very well and even have one.. and I also know at least half a dozen girls your size that are very happy with their new 10'6" Nalu's.. I'm thinking the Fly is very similar to the Nalu and is an excellent light persons all-rounder board .. I'm sure they'd both be great boards..

This is myself and my friend Mark on our 10'6" Nalu's about a week ago.. Awesome boards.