Quote from TGregg:
You don't have shadows on your analog ones? Hmmm, maybe I need some better cables or something. . .
I had a similar experience. A given dual monitor card, think it was ATI...had one port standard CRT, the other DVI. The CRT port played fine on an analog monitor. The DVI port when utilizing the VGA/DVI adapter and running another analog monitor played like balls.
It might have been the card, or some kind of phenom. I know that there is defintely a loss of signal integrity when you run this conversion process. I wish they made more dual monitor cards with 2 CRT ports and not one & one.