What is a good HAIR STRAIGHTENER besides the chi?

I've had three Chis at the cost of 100, they manage to break and not turn on in a matter of 5 months. My mom and I take great care of them also. What would be the best straightner that makes the hair silky smooth without doing as much damage as a chi. I'm talking about top of the line straigtners. I would like everyones imput. I use Rusk Flat Iron Spray and a Chi gel before straightning everytime also. Are infrashines any good?