Yeah, the plastic is a deal breaker for me, too. It's too much money for something too easy to scratch.
I played with a design like this a few years back, and even called up some stainless fabricators. My goal was to get a conical bottom that could mount firmly on top of a commodity kettle. Finish your boil, chill, strap on the cone, let the trub drop out, and pitch your yeast. Eventually I lost interest, but I think it would be a very cool product if anyone ever did the details right.