I'm sorry to hear that you're having an issue with your PN58C8000.
Try adjustingeither the Film Mode or the Motion Judder Cancel feature. To do this, with remote press the following:
Menu > Picture > Picture Options > Film Mode
Menu > Picture > Picture Options > Motion Judder Canceller
Changing these two options should give you the ability to view a picture that's not "too real", since changing these two options will adjust movement to provide a clear picture.
Just bought the TV and I have to say for blu-ray, sports etc, it is awesome.
However, watching HDTV I find that our favourite programs look too real... i.e. they look like actors on sets... what settings can I use to tone it down a bit?