The case I mentioned above already arrived. And I am more than happy with it.
The model name is "NK1520PCAB201S". It is basically a hybrid case plus a holster. But it features some benefits compared with the popular JKase Diablo.
The fit is simply perfect; both, the inner silicone layer and the outer plastic case fit snug and tight. So no worries the case comes off accicentally like i experienced with Otterbox defender. The build quality is excellent, no defects or marks on the silicone or plastic. Also, unlike the JKase Diablo, this case does NOT have those remarkable bumps and the soft finish touch on the back. That might feel exciting to touch and hold but it's a pain if you wanna slide it in and out of your pocket. Besides that the soft touch coating usually come off easily and looks disgusting.
The screen within the case is recessed about 2 mm. Just enough to not limit gestures but provide a good protection. Also the power button is a recessed which i like very much. The other buttons are a little protruding and still have good tactile feedback with the case one. Even two two stage camera shutter button works like a charm. The cut outs for connectors and camera are large enough and precise in placement. The bulk it adds is not as much as i expected: just about 3 mm on each side. And more important it adds a lot of grippyness! Sound quality improved as well as the phone is lifted away from the surface.
The only downside is that the holster just accepts the phone with screen facing towards the holster. That is good for protection purposes but why does the holsters beltclip also can function as a stand?! Anyways my idea was to use the holster for building a car mount with a goose neck. Let's see what I can do... maybe the heatgun will help the holster to accept the phone.