Solia or Sedu. 1 inch, or 1.25 or 1.5?

I have shoulder blades long hair, that's wavy and thin. I've read a gazillion reviews about Solia and Sedu tourmaline flat irons, and cannot decide. Some say wider blade will work faster, but is also heavier and harder to use; some say that Sedu is faster and easier to maneuver, and some say Solia Dynamic something system is extremely good for avoiding hot spots etc. It's not a question of price, it's a question of what's better in terms of performance and end results. Also, what blade length should I get? Is 1" sufficient for my hair length? I currently do not have layers, so it's mostly same length. Thanks in advance.