Thanks for posting your thoughts on the RX-1. I'm glad you posted lots of images, and I love the magnify function on your web site. I agree that it's quite a machine. I, too, have posted some of my thoughts about the camera and how it relates to the NEX-7: http://blog.kasson.com/?p=2584
I've found that, for raw shooting, there's nothing to be gained and a bit of image quality to be lost by turning the ISO setting past 1600; you're better off cranking up the Exposure slider in Lightroom or ACR. Here's a link to my test results: http://blog.kasson.com/?p=2830
It's hard for me to explain the feeling of wonder I get from using such a lightweight, tiny camera that makes such fine images. And it's so darned quiet!