I own a Venus Classic as well as a L&H 22. I love them both for different reasons but am now also considering a Aoyama.
The Venus is big, grand and sturdy, the L&H is classical and sweet.
The Aoyama is light weight and charming.
It is really like selecting a wedding gown. At 14 it is probably not her last harp. But it should be one that she loves and wants. That is really the most important thing at her age … so she will become amazing.