I have a Wenger SYNERGY Swiss Gear Computer Backpack. I love it. Very comfortable and has lasted over a year of walking through DC and many a walks through the airport. Zippers are heavy duty which is a major plus. Plenty of compartments for stuffing things and a earphone port if you use an iPod. I think this particular bag is discontinued, but you can still find it online and I'm sure the newer version would be just as good.