Setting up AMD CCC correctly for WMC7?

Sorry, I know this question has been asked before but I can't seem to find it.

I have a AMD HD7750 card and it is hooked up like this:

DVI to PC monitor HP 22" HDCP monitor

HDMI to my Iscan Duo with the audio out HDMI to my Denon AVR-4310ci

Ceton InfiTV4 PCI 4 tunner card

This all works fine but I am not sure of the best settings in CCC (12.10) to get the best picture.

I turn off all the extras in CCC control.


What color space to use ? RGB or , ........?

What Video levels to set? PC or Video

What I see is if I send PC levels out the black levels are better; but is this best?

Yes, I know RGB limited is broadcast standard but I want to minimize all unnecessary video conversions preserving best video quality.

Would like some help setting the card up for least conversions and best picture.

Thanks
Rew

Kinda what I thought but what color space to use RGB or Component RGB?

So checking let app control in CCC and leave Dynamic off then is best?

By the way my output of the Iscan Duo is to my BenQ W1070, these will of course set accordingly to the input.

Thanks
Rew