I'd say anything she chooses so long as it fits her draw length and Strength. Being as it's your wallet I wouldn't get too concerned about price, especially if you want to keep her.

A couple within reason and decent bang for the buck would be the Martin Cheetah or Leopard. It's going to depend on her draw length. And if you look at these know that they are adjustable 15# down from the marked draw weight. If necessary you can even fudge that a little. And the MPro/mini-MPro is one of the smoother drawing cams.

I'd mention more, but haven't kept up with all the offerings from other companies. It's nearly impossible. I'm sure there will be help soon.