What is the best hair straightener?

Im asking for a flatiron for Christmas and i was wondering which is the best type? (cost doesn't matter) My hair is naturally wavy but not crazy wavy, and its pretty damaged from my piece of crap zoe straightener. Ive heard the chi is pretty good, but it breaks fast, Ive also heard that is pretty good too. I would like a flatiron that makes my hair shiny less brittle and not frizzy. Thanks

Keratin treatment hair straightener