Am I crazy? Considering selling my RX100 and getting a Panasonic LX7 or Canon G15.

For me, it simply came down to the size of both cams and my preference for the feature set of the LX-7.  For me, the slightly better IQ of the Canon was really negligible.  I can carry about the LX-7 in a jacket pocket all day long.

If IQ is your primary consideration, perhaps the Canon is your best bet; however, I really like the lens of the LX-7 and its UI.  It was, in the end, a personal preference.