Go to
CamBags which is a great resource. People post pics of their camera bags configured with their personal kits, so you can get a better sense of what a bag will carry, versus trying to decipher the manufacturer's dimensions and determining whether it will accommodate what you're looking for. You can search by camera model, bag type, etc.
Another helpful resource is this
Nikonians "What bag do I need"
And Thom Hagan just posted his own
recommendations.
Me, I have a LowePro CompuTrekker AW so I can carry my laptop and kit when I'm traveling. I am going to get a Mini Trekker AW for schlepping around town, I basically use my shoulder bag for storage.
At my daughter's last game a guy was there w/ strobes for lighting, and a chest and waist pack....I said that's next year and my wife & kids threatened to not let me in the gym to take pics...
