both actually, first anything that will for sure hold its shape, and second anything cheap. the reason I ask is because i keep losing expensive balls, and when you're poor it's more than agrivating. tell me if you have any links to anything you think might be decent.
that trick is wicked hard, but what i think is harder is the one footed rainbow, you have to like dive forward after you heel-pop it up, just in order to be angled enough to send it over. I've done it like once.