Oh dear. Let me try to put you off:
- The RX100 is horrible. There. No. Not convincing.
- The RX100 is definitely not for you. You have a history of compact, precise cameras (Leica M6/M4, Sony NEX7..) to do serious things. The RX100 is not really in the same category. It has no viewfinder, it is too small to hold correctly like a proper camera. It's for cases where you say to yourself - Oh dear - I really want this image - I'm not sure I'm going to succeed but I'm going to try.
It's an approach I learnt years ago with the Rollei 35..