As an owner of both a 5D2, EP1 kit and Nikon D300 kits, I offer the following opinions. Horses for courses. If I was going hiking at high altitudes, there would be only one kit, and that would be the Olympus. I am 50+ and in fair health and even walking around town with my D300 kit is more then many days I want to do, despite loving this camera. The 5D2 kit with heavier lenses, is reserved for those days I am shooting from a vehicle, and most comparisons between the two real dslr's would still yeild nice indisgtinguishable prints up to 36", if I do MY PART. On short trips, I have decided that either I will purchase a D90 and take only two zooms for it, a 16-85mm and 70-300mm, or just take the EP1 kit. Even comparing those last two options, unless I plan on shooting rapidly moving subjects, the EP1 will do fine, and I have found the prints from the Oly more then acceptable to 30-36" wide. If you were a Sherpa, you would not even have posed the question, but in the real world I would rather have a camera that I still have enough energy to use when I get to a place, then carry a more comprehensive kit and not feel like using it, even if that was only a P&S....jmho...