Maybe my Dock was not OK, but rather believe that it is because of cheap China-quality and it is not noticed the other iPad2 reviewers.
I'm going to try my luck with nem other seller and if it's nothing, it looks mau with black Docks. The by Wentronic destined OK, but have back only a micro USB (instead of Apple 30-pin) and Audio output. This means that, for example, in the dock standing no HDMI adapter can connect to display the contents on TV. And otherwise only the BlackBox is still there in black, the costs but otherworldly ...
Why are there no black Apple Accessories ... * sigh *