Awaiting delivery of new Mac Pro with stock 5770 video card. Am I correct in thinking that I can attach three monitors (Samsung) and they'll all screen span? Not mirror, but stretched or shared desktop with the cursor moving from one screen to another. Also, can I pop in my NVIDIA 8800GT card, that I'm removing from my dead 1st gen. Mac Pro, and expect it to work and play nicely with the installed stock ATI. Thanks.