I used a Kata 3n1 before changing to a Natgeo walkabout 5070. Natgeo walkabout is great for travelling in my opinion, can put laptop, 2 lens, 1 camera body, one flash and a tripod on the side. Plus a top compartment for misc stuff. For me it's more for style.. Haha
I got the streetwalker pro. Very comfortable, lots of space and compartments and feels light when your equipments are heavy. Water proof threading and raincoat as well. Got tripod holder. It's almost like an all in one except a laptop compartment which the Streetwalker harddrive has. I feel like switching now..