I agree with Shelby that the Harp Connection in MA is fantastic (rented my first harp from them, and their customer service is stellar) – but if you’re looking for a Camac or a Sligo, be warned that they don’t tend to carry either brand. From what I’ve seen, they carry only the “big names” – L&H, Salvi, Dusty Strings, Triplett, and Wm Rees.
As far as the Camacs go, I love my Aziliz, but have never played a Hermine, so can’t really offer a comparison. If your daughter prefers one over the other, that’s the best opinion you can get. In my experience, Camacs are generally very well-made, and I know at least two professional Celtic harpists that own & play Camac lever harps.