I'm sure this is a topic that has been well covered, but after a quick search I found only a few threads with solid information.
For those who use a briefcase, what do you carry? In my opinion, it is one of the focal points to a solid businessman look and it is one of the first things I notice when first meeting a prospect in my line of business.
I personally carry a smaller Dunhill case. It's large enough to carry an ipad and several folders/documents, but not so large that I can't hide it under my chair at a conference or on a plane flight.
I also own an ST Dupont about the same size, but it is a bit more flashy than my Dunhill and not something that I use anymore in my area of the U.S.
One of my business partners has a Floto case and it's fantastically made. I almost considered buying one myself.