Tamron, Nice bag but I suggest a back pack style camera bag. I need to invest in one because once you include camera, lens, tripod, it becomes a lot to haul.
It has room for my Dell 15.4" Laptop as well as most of the camera gear listed below. Can get a bit heavy, of course, if everything is loaded. Fits well under seat in plane if necessary. It's well built with velcro dividers and a rapid-access top. Cost me about $115 at local camera shop. I also have a Canon backpack which is very sturdy and comfortable
but I'm not wild about using a backpack for regular photo use (not very accessible). I use it if I only want to go out with camera and a couple of lenses and don't want to bother with the big bag.
I have two Lowepros's (AW200 slingshot and a twelve year old top loader) and can't say enough good about them. Friday night as an example. Trying to take firework shots and the rains fell. It's nice to quickly pull the bag condom out and have the gear with another layer of protection from the elements.
I use the Lowepro flipside 300. Security was a concern for me since I will be going to a "pickpocket haven" in a couple months. I LOVE this bag! It holds everything I have perfectly.