I have a sony A57 and 2 lenses (the 18-55 kit, and a 70-300 that i bought additionally). I would like a backpack style backpack because I like to walk with my camera and take it to sporting events. Having been so used to using one this far in life, I would like to stick with what I know. I also like the safety of having it over both shoulders. My significant other's parents have told me they want to buy me a backpack for my camera for my birthday coming up. They want me to pick one out. I'd like to stay under 100 dollars, but you could convince me otherwise--if one blows me away, i'll buy it myself and have them get me something else. Any recommendations? Thanks for your time.