Not really an expert on that kind of thing, but this is the first thing that came to mind:
http://www.saddlebackleather.com/Classic-Briefcase-Thin.html?sc=8&category=83
I'm quite in love with Saddleback products. I was reading earlier their site and now I'm pretty crazy about leather quality (
http://www.saddlebackleather.com/Leather-101.html). And the bag you pointed is pretty good looking. The only problem (besides price, but this is a high quality bag/leather) is that the bag itself weights aprox. 6.5~7.5 lbs. Since I have to carry a a lot of paper, law compilations and my iPad, I was looking for something lighter.
(they have a few colors...check out Chestnut and Dark Coffee Brown)
Maybe not professional enough, though.