I too am 5 ft, 110 (small world!). I had the Fun 1.5, the older version. I've heard the new is more playable, easier to roll, etc. But I can't comment on that yet.
When I was considering which to get, the Star or the 1.5, I called EJ and he helped me decide. You might want to consider. That said, demo both! And preferrably on the river. Be sure to try rolling them! I was very frustrated because I couldn't hand roll the 1.5 (but could pull off 20+ hand rolls in a Necky Jive -- good for my ego to mention that!)
I didn't feel the Fun 1.5 was at the upper end (too small) for me at all! It didn't sink the way the WS Evo did when I owned that boat; it ran rivers very well and had surprising speed for it's size. That said, it was more of a playboat/advanced paddling boat at my size and thus required more skill in river running; it can be unforgiving of river running errors.
Last, I could be frustrated with rolling depending on how loose my fit was in the boat; if my fit was tight, the boat was harder to roll. When it was loose, it was easy (except of course for my hand roll).
Hope that helps!