I personally would choose one of the bird fabrics. They are big prints with lots of color variation and no hard lines.
The reason that I wouldn't choose fabric 1 - is that there isn't enough color variation. Love the fabric, but not sure you'll get the traditional OBW effect.
Again with the pink - I don't think there is enough color variation.
The sparklers don't feel right - can't explain that one. But you never know - that could be a good contender.
Anyway, just my 2 cents worth. Love to see what you do regardless :)