Hi all, just getting ready to pull the trigger on either the Domke J-5XB (the ballistic nylon version) or the F-5XB (the green or black canvas, not the brown rugged wear - not big on the brown color). Anyway I have a few questions on the differences between the two bags. The first is the ruggedness - any comments on the wear between the ballistic nylon and the canvas and the resistance to water? Also, I'd noticed that the nylon version seems to have a little more padding - on the ends and also has what looks to be a nifty little rain fly under the zipper that the canvas 5XB doesn't. Is this true? And is there a difference between how the bag will conform to my body over time?