Forget Herschel. They're made in the PRC. With bags, I avoid anything that's made in China, Vietnam or Philippines.
Duluth or Kletterwerks are both made in USA and fantastic quality - I've owned bags by both of them and they're rock solid. Filson has a great reputation as well (as mentioned above), but never bought one.
On the Japanese front, Master-Piece are always really well made. I've had a couple of their bags.
I also love the look of this.