Hello, i'm going to buy a new Mac Pro octo in a few days but i'm still wondering about the graphics cards. I definitely need two of them in purpose of running four displays. The second will be a standard GT120. What i need now is a fully compatible card that; a. can drive two displays (30" and 24") b. works without trouble with windows (bootcamp and XP or 7) and OS X c. has a good gaming performance (i guess the 4870 is pretty poor with a 30", isn't it?) I looked at the 4790, but i heard about difficulties with two monitors. Thanks in advance!