Tamrac Adventure Messenger 5 Laptop and DSLR Camera Bag

I need a new bag for my camera and laptop. Right now I have a Canon 40D, but am hoping to move up to the Canon 5D Mark II. I have two lenses, the 24-105mm, which stays on my camera most of the time. I also have the 70-200mm lens. I use the Canon 580EX II flash, and my computer is a 13" MacBook. This looks like a bag that would be both comfortable and convenient for all my stuff. Does anyone have a terrific bag they love that would hold all this and still be comfortable to carry through the airport or in the outback? TTFN SDG