Eric,
I can say as a Kanstul dealer, I have heard nothing but good stuff about the Calicchio people in Tulsa and those who want lead recording horns, it is a great option.
But why not buy it from a dealer? One thing as a dealer I really dislike is having to compete with the factory. Kanstul only sells through dealers -- which is nice. Even if you want a customized horn -- see a dealer.
Just my 2 cents worth.
Jim