my hair is very random, it is never the same every day. I have a good flat iron but im just wondering if theres one out there thats even better working. Or what is probably going to work for me.

In my opinion the best i have used was a plain old conair iron!

Ghd irons are the best to use especially on wavy hair, i find any others irons i use can pull on the hair. If you have got thick wavy hair id suggest buying the thick plated irons as they work really well on this sort of hair. As an extra tip as youre styling your hair try blow drying your hair before straightning to get it as smooth as possible, this will make it easier to straighten, then as you straighten glide the hair through them as slowly as possible this will help get it a lot more straight.