Just hung up my Fed IV for the evening and wanted to +1 the recoimmendation for the Akubra hat. I wear the thing daily, and live in a temperate rain forest in British Columbia, Canada. It's held up to all of the adventurning I've put it through, and not only gets better looking every journey, but is also easy to rebash if (like me) you screw it up the first time (even after creasing the bejeezus out of my bad bash). Of course I'd love to have a Henry or AB Deluxe, but at a hundred bucks, you can't go wrong with the Akubra for a real hat. Plus, their turnaround time is great, and customer service was FANTASTIC when, through my own fault, I had to exchange my first one.
Oh, and stay FAR FAR away from the Dorfmans. I picked one up for a costume one year having read all the complaints about the hat, but thinking "what a bunch of overly critical loosers". As a real hat meant to ever be worn the hat SUCKS - bad bash, stiff, virtually impossible to reshape, and just terribly, terribly wrong in ever dimension and feature (circular brim, tapering crown, teardrop dent, wide spacing between the side dents, wrong colour, wrong ribbon...it's not even a good ToD hat, which is saying something) which would identify it as THE hat. It's almost as if DP was forbidden from looking at any reference material or seeing the films, and was just told "uh, I dunno, he wears a brown hat".