The [shoplink 8454]Sony NEX-7[/shoplink] is very likely the most sold mirrorless camera of the moment and the reference for reviewers when testing other cameras. DxOmark (CLick here) just published the full Pentax K-01 test which uses a Sony sensor. The camera gets very close to the NEX-7 in terms of sensor quality but is very distant when it comes to sex appeal :)
There will be much more discussion on the next review: A very simple High ISO comparison between the Fuji X PRO 1 and the Sony NEX-7 has been posted by Steve Huff (Click here). Hm, I think they are pretty close with the Fuji having the edge. But I guess in RAW the difference will be even more negligible. At least according to Amazon US ranking (Click here) the NEX-7 beats the Fuji X PRO 1 orders.
Anyway I can imagine a NEX-9 camera positioned above the NEX-7 with larger body like the X PRO 1. I shoot some test video with the NEX-7 is really damn too small sometimes.
P.S.: NEX-7 order search links at [shopcountry 8450].