The Stream and Pool image I posted last night was shot at ISO 1600. I would have never considered this high an ISO in the past but my new 5D3 handles it with aplomb and 17X22 prints should not be a problem. I did it because I could see that on the LCD screen, the ISO 100 pictures had very blurred out water totally devoid of the lovely reflections I was seeing. Even 800 didn't help but ISO 1600 and 1/8 of a second at f11 solved my problem. My intent was to use the ISO 100 images as a focus blend in Helicon Focus, then use one of the ISO 1600 images for just the water, but in the end simply blended the ISO 1600 images because they looked so good, then used one of those images for the pond water, and another for the further stream (moving water doesn't go well with focus blending).
The times and equipment are great.