Which flat iron??????? Help plz!?

I have a chi and they work really well but you have to make sure you put heat protector on it because it caused my hair to split but any flat iron would if you dont put protector on it i like the chi better i have used a conair and i dont like them i have thick curly hair in the middle of my hair and the chi gets that part way straighter than the conair conair is more for people with thin hair than curly and thick chi's ar worth the money andis flat irons work well also a man that did my hair once used it and the h2pro flat iron works good it was like $70 dollars at are local beauty supply