I upgraded from the original RX1 to the RX1RII and I regretted it. Two reasons:
- I found 42 megapixels needed near perfect technique (not something I wanted to do on a P&S)
- Less DOF
Basically, IMO, I didn't want to use a tripod or fast shutter speeds or have to stop down to get DOF on a camera that is designed to be P&S.
That said, I love the Q1 and 28mm is perfect for my hand held work. But I don't think I'll be upgrading, unless they bring out a native 50mm version.