March pumps are not necessarily THE preferred pump anymore. Little Giant makes some excellent magnetic drive pumps and from the reading I did before buying one, they seem to be a lot quieter and perhap even more durable. (According to the specs, I can run my little giant dry for 8 hours without damaging the pump).
Anyway... from some digging I did back when the chugger first came out, I am pretty sure that the Chugger's ARE march 809's, probably with some scratches or something and being unloaded as factory seconds. I think they just get a green paint job and a new logo and become Chugger Pumps.
Regarding the Wayne pump you linked to... it looks like a basic transfer pump and not really meant for hot liquids that will eventually be consumed. I have a little pump like that in my garage. I got it with the intention of using it to pump ice water through my IC, but two things about it made me stop using it.
First, it was loud. CRAZY loud.
Second, it had to be primed with vegetable oil to get it lubricated before each use.
You really want to find a magnetic drive pump, preferably made of food grade materials and capable of handling the high temps of boiling hot wort.