I'm looking to get either a nylon backpack or messenger bag that I can carry around and not worry that it will get dirty. Any suggestions where to purchase one online as I don't have time to get to a department store? I looked on neimanmarcus.com and Saks.com but they only have the messenger bags and I think I may be leaning towards a backpack. I found this site: Backpacks: Girly Treasures but I'm not sure if it's legit. Any suggestions would be so helpful!!!!