From my research so far I think only the geforce gtx 465 470 and 480 models have 2x DVI-D DUAL outputs on board. So it appears so far my only option is to buy 2 of one of those models. The monitors I am looking out will only that that inerface without adapters. Conversions won't work. Ideally I'd prefer a card that had 4 DVI-D DUAL outputs.
KFA² MDT X4 GeForce GTX 570, 1.25GB GDDR5, 4x DVI, Mini HDMI (57NKH3DH5PXK)