there's no such thing as the bag
Feh. Is too. I've been using a Lowepro Off Road for the last 5-6 years. I got it because it seemed the sturdiest soft-shell bag available that wasn't a humongous back-pack, and it's served me quite well. I wanted something that I could take out on the trail with me while mountain biking. It's survived an adventure trip to Costa Rica (three lenses + body + filters + film + mini-tripod + small tripod strapped underneath), and a trip to India (much less than previous trip). I honestly haven't wanted or needed a second bag.