I posted a question previously about slow performance with an additional PCI Radeon 2400HD video card to host a 3rd LCD. What I have come to realize is that the standard PCI bandwidth cannot keep up with the demanding vista GUI so instead I am looking to replace my PCIe video card with a card that can support 3 or 4 monitors. I know there's the Nvidia Quadro NVS 440 and the ATI FireMV but I suspect video performance will be less than stellar with those cards (If I had to choose, I'd lean towards NVidia). Are those dual GPU video cards compatible with non-SLI/Crossfire motherboards -- and if so can they support 4 screens? Please let me know the best way to deal with this. I would prefer not to replace the motherboard as I would have to find one compatible with my current case and all my other hardware (and considering I have a Dell, I may run into a plethora of compatibility issues. Thanks.