I have heard of them all, but unfortunately never tried any of them.
Just had a brainwave! We also stock Weleda in our salon (demanded by clients) who do all sorts of things along with skincare (body care, natural remedies). They're a well established company and give excellent customer service.
There is also no initial cost, you've just got to fill in a trade application and then it's up to you what you purchase. Trade prices are very reasonable, and they look professional enough to retail easily to clients.
The only thing I would say is some of their products contain lanolin, so you may want to watch out for that, all depending on your views. You could just pick and choose and avoid the ones with lanolin and still be left with a decent skincare range.