I vote Chrome - but not messenger bag, like TIP said, it is like a big envelope. The backpack works well. And if you ever take a trip out to SF (i know its unlikely for a bag) but they have always offered to restitch the chest strap for me since it tends to hit right at the boob line. I still havent taken them up on their offer yet and I just lift and strap underneath and ignore the whistling from the pushup effect.

I am jaded though - i have to wear backpack style now because I carry a laptop and text books.