The equalizer will be the fastest option at that weight and likely draw length. My wife shoots a Vectrix at 52 pounds. It is a great bow for her. The selena is definitely an option, but there are far better. The selena is marketed as a bow specifically for women, so the price went through the roof. You can do a Vectix or Equalizer for nearly the same and get a better bow. The trykon I would say wouldn't be the best option because the draw cycle is a little harsh on them, so I think the vectrix and equalizer will be easier to pull. The ross will be the smoothest draw of the bunch though, so I would suggest trying one of those as well.