I originally purchased the Nex 5 to be a walk-around camera when I didn't want the bulk of a dslr (e.g. my A700) but a P&S was too limiting. I subsequently found the Nex 5 live view was great for composing landscape and macro shots on the tripod. The Nex therefore became my main camera. The only time when the A700 was still a better bet was when fast action meant the Nex 5 wasn't able to focus quickly enough and a view finder was easier for following the action.
When the Nex 7 and then 6 were released these cameras looked like they would address these weaknesses in the Nex 5, making them better as a walk around camera. The A99 interrupted my plans for a while and this instantly became my preferred tripod and macro camera, so the Nex 5 went back to being just for walkabouts. The Nex 5's lack of view finder was still occasionally inhibiting for a grab shot when out and about.
Trying to decide between the Nex 7 and 6 was tricky. There are quite a few review sites that try to answer the question, "which should you get?". The Nex 7 has the bigger sensor (24 v 16 mega pixels) the tri-navi controls and an extra flash port. The 7 also has the old Sony hot shoe. The 6 has wifi and apps, the new hot shoe, more conventional controls and slightly better high iso performance (which may be an advantage for a walk about camera). In the end I wanted to be able to play around with the apps etc. on the 6 more than I wanted 24 mega pixels in the 7. I also didn't think the tri-navi was really for me, and if I get a flash for the A99 then it will also work on the 6 without any adapter. A final thing for the 6 was that it was a bit cheaper, and it came in a kit with the SEL 16 50 which I was very keen to try as a handy smaller walkabout lens (the 7 only seems to come in a kit with the 18-55).
Initial thoughts on the 6:
It is still a small camera but has a much more reassuring weight and a bit more bulk then the 5. The Nex 3 and 5 really are marvels of miniaturisation, but at the end of the day are perhaps too small when it comes to providing buttons, and built in view finders and flash. The Nex 6 feels nice in the hand and feels very solid and well built. The (electronic) view finder is great and I have no problems with this rather then an optical one.
Focus seems really quick and 'snappy' compared to the 5. The extra physical controls are great, especially the Fn button which takes you in to quick navi. No more endless menu diving as was often required in the 5. I have also liked playing with the intelligent auto setting, just to see what it will do next
The one negative so far is the video button. The video button has been move slightly to make it more difficult to press accidentally and is now impossible to press while keeping the camera steady in the hand. I will be leaving a few seconds at the front of all videos for cutting out to allow for steadying up the camera!
A lot more playing to do. I have also acquired the mark 1 version of the Sigma 30mm for Nex which matches the camera nicely. Exciting times. Just need more walkabout time now