Christmas is coming, and my younger cousin wants a Clarisonic. I know her family is a little down on money, so I want to help them out by getting her a Clarisonic and saving them a little money. There are quite a few Clarisonic sets, and I was wondering which one would suit her. She's only 14, and has semi-sensitive, acne-prone skin. She usually has a few whiteheads... What Clarisonic/Clarisonic set should I give her?