What does $2000 more get me with the RX1 that I don't get with the EPL5?

Some would say yes and others would agree with you. Some of us are glad that several cameras that break new ground have been released this year.

The RX1 is a camera that has many enthusiasts excited, including Steve Huff.

To be totally honest, there has not been any camera that I have tested or owned  in recent times that has given me the visual rewards like the RX1 has. What I mean by this can be explained with a few reasons..1st one is ease of use. The ease in which it gives you beautiful quality and rich images huge in Dynamic Range is pretty sweet to have. I also say this due to the size of the camera. No camera of this size can give you results like this. Period. You can get it with a Nikon D800 and Zeiss 35 f/2 but that combo would be much much larger, much much heavier and much much more expensive! After shooting with the RX1 for a few weeks I have grown to appreciate what it does and I seriously do not want to be without it! With most cameras, after I review them I am fine with sending them back to the manufacturer but not this time!

http://www.stevehuffphoto.com/2012/12/03/the-sony-rx1-camera-review-part-2-my-pick-for-camera-of-the-year-2012/