I'm not sure about the 16-105/4 lens, don't know if high quality and 16-105/4 go hand in hand.
Regarding NEX-5 sensor versus NEX-7 sensor, my guess is that the NEX-5 sensor may be a tiny bit better at actual pixels but probably about the same if you print. The 24 MP sensor will have less issues with moiré and other artifacts. On the Alpha 55 SLT I can see some issues I have never seen on previous Alpha and Minolta cameras. My guess is that 24 MP is actually a good thing.
I'd say that NEX-7 with a really decent lens would be quite attractive, and so would a NEX-6. Just be sure to find one without water inside...
When I talk to Santa I'm asking for a Sony NEX-6 and a high quality 16-105 f4.0 lens
He'll probably ask what a NEX-6 is and I'll say a NEX-7 with a NEX-5 sensor
Am I crazy?