You may want to consider the Crumpler 6 Million Dollar shoulder bag. I'm using one and it's perfect for what you said you will be carrying with you
It's stylist, very well padded and doesn't scream "Expensive Cameras Inside"
Amazon list them:
Amazon.com: Customer Reviews: Crumpler 6 MILLION DOLLAR HOME Shoulder Photo Bag (Dark Brown/Oatmeal/Light Olive)
Read the many reviews there and you'll be convinced
