What do you take/ want to take in an ideal world when you trace. For me it would be 2x G3 1 x EPM2 12-32 panasonic 14-140 Panasonic 45mm Olympus 17mm Olympus f2.8 2 chargers for the Olympus and 2 for the G3's 9 batteries for the Panasonics 7 for the Olympus about 4/500 gig of SD cards ND and polarising filters for in 37 and 46mm At some point the kit will be supplemented with one of the 25's or the 20mm. I have to test this though as to if I can carry it all around though I would likely leave one of the G3's at the hotel as an emergency camera, if the 14-140 makes it too heavy it will be replaced by a 60mm sigma. I have Fybromyalgia that rather annoyingly dictates what I can carry for extended times, I used to wander with a couple of bigger nikons no issues can not even hold a D90 for more than 20 mins now with out pain. I will walk for miles though with a camera in hand, not notice how much I am doing get home and feel it for days on end.