I have had lots of ballistic cloth cheapies, Atlas leather cases, Orvis stuff, but my favorite and daily briefcase for many years is a Filson briefcase/computer bag. I'm not sure how old mine is, but I got this one the first year they introduced this "bigger" version, and when they were much less expensive. The "regular size" was too small for me in lugging law stuff and church stuff. This thing is staggeringly expensive for canvas, amusingly heavy, capable of being used as a weapon in case of a riot, and about as indestructible as you can get without adding armor plates. If you are not careful, the brass zipper with "decorate" your snazzy bible cover. All that said, I really like mine. http://www.filson.com/briefcase-computer-bag.html
Clava has great stuff but it looks like the style I have was discontinued. I've had it probably five years. Still looks great. This one is close. My daughter wouldn't have it any other way than this though.