I've been looking at getting a commuter brief, as my Timbuk2 messenger bag that I use daily is a little big and doesn't dress up very well.
Right now the best contender for me is the Tumi Alpha Bravo Albany Slim Commuter. Looking for something of good quality around this size (~4"depth, enough W x H for 15" laptop max, my current work computer is only a 12.5).
What are you guys using? Budget around $5-600 max. I'm not a baller so no $1k+ bags for me.