The G7X II would be an excellent upgrade to the G16.
It has a larger 1″ sensor, faster AF, better image quality, much better low light capabilities, better video, smaller size, and other upgrades. The Fantasea housing for the G7XII is better and allows any 67mm lenses to be attached, and many more improvements overall.
I recommend reading my review on it here:
Update Jan 2020 – The Canon G7X Mark III has been released! See the bundle here.
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