Straightener help please. Thankss[:?

Okay, so my old straightener isn't really working that great and i was thinking of getting a new one for next year. I am going to either get the Conair Infiniti I-Series 3/4" Straightener, or Remington Wet 2 Straight with Slim Plates, or Remington Wet-2-Style Curved Straightener. I have regular to thin hair that comes a few inches under my shoulder. Which one do you think will be the best? Or in other words which one do you think will take the least time for my hair to be completely straight? If you have any other suggestions for straighteners please share! Thank you!