Chi is no longer good, they are cheaply made and overproduced. Babybliss is great if you have very thick hair, they get super hot. They get too hot for my hair, but if you have thicker hard to iron hair they are great. Haven't tried the other ones you mentioned. What kind of hair do you have? I have thick hair with a natural wave/frizz, very hard to straighten. I have had luck with the Sedu, but it stopped heating up. CHI used to be the best, they are no longer the same quality.