I am leaning towards pink (#4), but because I am interested in your opinion, and also because I've got nobody around to bounce it off of, I'm having one of my ol' fashioned votes.
#1: Turquoise and yellow...pretty but kinda plain. My first impulse. This is the color scheme I first imagined it in.

#2: Green and orange-red together, like something you'd find in a thrift store.

#3: More muted pink and blue and warm grey...gives it a whole different feeling, doesn't it?

#4: Think pink! My favorite so far...but I like the others too...maybe it's too pink? A little too saccharine?

I'm painting it tomorrow, so don't think about it too long!