Curls

Hello beauties,
I have a question to you! I found this amazing picture on a site and now I want it, exactly the same isn't possible I already know but a bit similar. Lets first watch the picture

Or the ones like Kenza has, they're so perfect.. Firsly I need to buy a curling iron but I don't know which brand has the best. I don't want some crappy thing :P.  I really need some help, if you understand me hihi.