Here's a funny story about Pan World:
They apparently make the Coralife Turbo Sea Pumps. Flow rate and specs are identical and I just picked up a used Coralife Turbo Sea from the Zs and the label on the motor housing didn't even have the Coralife Model on it -it had the equivalent Pan World Model on it. So they're not trying to hide this very much...

Haven't ahd a chance to try it out yet. I've heard good things about Blueline too.