Well after a long hard search for a roller - carry on bag that can carry two bodies, five lenses, strobe, batteries, two card readers, laptop and all peripherals I've finally figured out what will work. It is a black roller bag that is carry on size. It has a small backpack that can be zipped off. This will hold all the laptop/ mobile office stuff. While this will be a tight squeeze to get everything in - it condenses two bags - a computer case and camera bag into one. This leaves me room to hand carry either my 600mm f4.0 or 400 mm f2.8. So now I can carry all my basic gear on without an assistant. It also rolls which saves my aging back and neck when running through airports. Best of all it doesn't look like a camera bag.
Dakine Zip Away
http://www.dakine.com/
Dakine Zip Away
http://www.dakine.com/