Just picked up a mint example of the Powershot S100. Nice , very compact. I had an S90 some years back but the S100 has moved on a bit. It’s smaller , has a wider lens with 5 times zoom. Takes JPEG & RAW. Not the latest model (that’s the S120)  but still takes a good photograph. The JPEG images look very nice. Not really tried it in low light  that’s where the RX100 trumps most other point and shoot cameras. In truth I’m not expecting the same quality results. Hopefully it’s a nice small camera to carry around. Be aware this model had a lens error problem , if this occurs and it’s not due to damage Canon will repair free of charge.  I reckon a worthy update to my old S90. Lots of reviews around on the web.