Well, I personally wouldn't call either the G1 X or G16 "compact", especially relative to the RX100.
I'd also note that the G16 doesn't do 1080/24p. Although, as I've noted a bunch of times before, for "great video" the vast majority of people would be better off with a dedicated video camera.
Full disclosure: I own an RX100 (original) - Mark
P.S. I have a lot of experience buying from the U.S. since I'm in the U.S.
But seriously, note that there may be warranty/support issues with "grey market" imports.
P.P.S. you may also want to note that there's a rumor
that the RX100 III will have a lens that is much faster/brighter on the long end. (f1.8-2.8 vs f1.8-4.9).