When you find one, let us know!
Seriously. no one here has reported billowing vapors. It's possible, of course, to increase quantity by dripping liquid into the atomizer, but who wants to do that each time a puff is wanted? Fact is, the Chinese manufacturers said on Web sites that they tried to make it produce very little vapor, so as to be discreet in public use. The more it looks like a smoking cigarette, the quicker you'll attract unwanted attention.
I have a pipe, cigar and cigarette to use. And I've learned that e-smoking is different. It requires a different technique. But it can produce every bit as much of a nicotine hit as regular smoking. It just sneaks up on you, that's all. Personally, I think quality of liquid has more to do with satisfaction than cig brand name. The Chinese are VERY good at copying.