I just bought the Olympus XZ-2 after reading this, and many, many more articles between the RX100 and XZ-2 - I went with the Olympus mainly because I really find flip out screens very useful, the image quality is very close to the RX100, and it just seems to be more versatile all around. Having a usable camera is always top of my list, and while I appreciate the large sensor in the RX100, that seems to be its one trick, whereas the XZ-2 many.
Also was able to find the XZ-2 for $100 less than the RX100, but that weighed little on my decision. If they wanted perfect - I wish it had a 24mm wide lens, but hey :) - its got most everything else I was looking for.
Haven't got it yet (should be here in a couple of days) but looking forward to it. Have not read a poor review on it yet, so hopefully it fits me well.