Sedu, chi, solia, rusk etc? best one?

I have the same hair type as you and I can't manage my hair whatsoever when it is curly. I've been through tons and tons of hair straighteners (cheap and expensive) but I found my favorites. I used Chi alot back in the day but I found that they burn my hair because they have no heat settings. I like flatirons with heat setting such as the Wet and Dry from Target. But my all-time favorite is the Sedu. It gets my hair sleek and pin straight with no flyaways. I'm in love with it.