I wanted top IQ in a pocket option without spending a fortune,micro 4/3 lenses are overpriced in my opinion,and the direction of there lenses are not doing it for me.
Samsung have a great expanding lens choice, 16mm,20mm,30mm and soon to be released 55mm f1.8,all pancake lenses,which for me are what small large sensor cameras should be about.
The new sensor is very much better then the older 14.7 sensor and superior to the 4/3 sensor,looking at jpegs and Raw ,i would say the Samsung sensor is about half a stop behind the Sony NEX 16 meg sensor.
The Dynamic range is brilliant,i can bring out shadows with no noise with ease,and the highlights are very well kept in detail,again far superior to 4/3 sensors.
The build of the NX200 is fantasic and the grip makes one handed use really easy as well,screen is OK,but i have seen better and sharper screens,autofocus in good light is fast,not so great in low light,controls are good and in the right place for quick and easy use when out and about.
IQ is much improved over the last gen of NX camera's, the jpegs give great skin tones and colours and can be easily changed in camera,noise reduction seems a lot lighter then the last NX generation which over done it, i would say the new sensor is about 2 stops better hence the ability not to need so much noise reduction,jpegs look very very good from 100-400iso , 800iso and above also very acceptable, you can get a bit more out of the RAW files at higher ISO with Adobe etc.
The single worst thing about the NX200 is the RAW buffer is pathetic, very very slow, hence why i have given 4 and not 5 stars.
Still Jpegs are fine on the NX200 and still respond well to manipulation in Lightroom, shadows and highlights respond well enough and colours can be enhanced nicely,auto white balance is also very good even indoors.
If you want a tiny large sensor camera that can fit in a large pocket with a good choice of dirt cheap, good optical quality pancake lenses,then the NX200 could be your camera.
For zoom lenses i would suggest waiting for the next NX with built in EVF .