Every time I use my Red Oxx stuff (Air Boss and Metro briefcase) I appreciate them more and more. The quality is amazing, think something completely over-built and worth every cent. If you are looking for a shoulder bag, Red Oxx, in my opinion, is the way to go. And regarding the higher cost -- sometimes it doesn't pay not to pay!
Sorry, i get overzealous about my Red Oxx stuff on occassion...