Not sure about the Sony ZV or Ricohs but the X100 series are excellent cameras - the compromise of going for a prime lens works very well for this format in my view (Sony used to have the RX1 series but it was probably too expensive and a bit too big to work). I've used them since the X100s.

They also seem to be rising in popularity recently amongst people who don't also own a pile of DSLRs or MILCs - I think this is mostly due to the retro styling.