I use a stainless filter for everything that goes in the boil (http://utahbiodieselsupply.com/brewingfilters.php), so I never get any vegetal material coming through.
Question: Do you use pellet hops, or whole leaf hops with this filter?
Like the OP; I've been researching filtering systems that would work for a "plate chiller w/pellet hops" set-up, and the one referenced in your post was a nice looking option until I learned they were designed to work with whole leaf hops and while it may work as well for pellet hops, what I read was that "if using pellet hops, some material will pass through this filter".
The Hop-Stopper, however, http://www.theelectricbrewery.com/hop-stopper
will work with pellet hops. When I went straight to the manufacturer (Innovative Homebrew Solutions) they said, and I quote the manufacturer: "As for performance, the Hop Stopper will work great with your plate chiller. Plate chillers are the most efficient products for chilling available to homebrewers, but, as you well know, their Achilles heel is that even the smallest piece of debris will clog them. The Hop Stopper is designed to effectively filter any debris that might clog your plate chiller, even pellet hops."
These guys did an experiment with a BUTT-LOAD of pellet hops and even when the Hop-Stopper had a couple of inches of hop-sludge on it, it still managed to allow almost all of the wort to be pulled from the kettle.
When I start using my new plate chiller; I'll likely go with the Hop Stopper so I can run straight to the fermenter instead of recirculating (with my IC) like I do now.