This diminishing returns thing may be common in many hobbies, but I'm having a hard time finding another one where that last 2-5% of benefit doubles the price of the schwag. Not for nothing, but the D.A. bikes with their pricier components and wheels but essentially the same (or very similar) frame set are like a half pound lighter, and that's about the only major advantage I can really see. So the 16 lb version is double the price of the 16.6 pound version.

That's marketing. Hey, people buy Harley friggin Davidsons too. I mean go figure.