Hey Paul - On the Samsung (on my model), from the remote under Menu - Picture - Size - Just Scan is one of the options.  When I use that it fills the screen with the pc's output.  There are other options there; 16:9, Wide Fit, etc.  Just Scan seems to be the best setting when using it as a monitor.  It fills the screen, the text looks good, but the image is a little smushed down.  Like the layers on the right side of the Vue screen is short - you can kinda see it in my pic above.   I haven't played around with the Nvidia settings at all, mostly because I'm not sure about what to change. It's mostly been with the settings on the TV.