I completely forgot to post my impressions of the Sony stuff I got a hands on with so here goes.
The RX1 is fucking awesome. It does not have the phase detection version of the 24MP sensor because the engineers thought that it would compromise IQ with the specially made Zeiss lens. No matter the AF is still very fast, I think it uses a whole new CDAF system developed for the camera, I hope it can be rolled out to the rest of Sony's cameras. The build quality is magnificent, the whole camera screams premium product, it is weighty, but not heavy, the metal is smooth but not slippery, only Leica make premium cameras with this kind of quality.
Image quality is stellar, absolutely amazing. The sensor + fixed lens combination has helped a lot with this I suspect. The 35mm f2 Zeiss is a bespoke lens and has been adapted to eliminate as many distortions as possible. I wasn't allowed to take any of the photos I took with me, Sony are keeping a very tight leash on them until November, but they are class leading. Low light performance is amazing. I saw very little noise at ISO 3200 and below that it is just so clean. I think Sony have reworked their JPEG engine as I saw much less compression and less detail loss at high ISO than with previous Sony cameras (I have the RX100, so I know the deficiencies of Sony's JPEG engine). However, without a closer look I can't be sure.
Overall, if someone is willing to spend the money and isn't bothered about zoom this is possibly the best camera for under $3000. Bottom line, I am seriously considering getting it, but I feel like I would waste the potential and so I probably won't. For professional street photographers who like getting candid shots (especially at night) this is a must have camera.
The NEX-6 is great. IQ is superb, but I only took JPEG and it does have the same problems as other Sony cameras at high ISO (serious loss of detail, smoothing, compression artifacts). Like I said above, the RX1 did not have those problems, so hopefully the NEX-6 receives a firmware upgrade for whatever improvements they seem to have made for the RX1. I didn't get to use the 35mm f1.8 though. I did use the 10-18mm f4 which was decent and fills a big gap in the NEX line up. I asked about an 85mm and a constant aperture standard zoom but I got a "no comment" answer. The power zoom looks to have made the same sacrifices as Panasonic's power zoom, it's good for being compact and it is slightly wider (24mm vs 28mm) but the IQ compromises were a bit too far for my liking. Honestly I think Sony need to bundle this with the NEX-F3 rather than the 6.
Anyway, the conclusion is that the RX1 is awesome, the NEX-6 is decent, but the power zoom is not. I was told that the first shipment of the RX1 is sold out, so anyone who hasn't pre-ordered may have to wait, but that was for Europe, not the US, he wasn't sure about US sales, only that they were very brisk.