Two ATI RADEON (512GB x2 = 1GB) GDDR5
OR
ONE NVIDIA GTX 285 (1GB x1 = 1GB) GDDR3
OR
FOUR NVIDIA GT 120 (512MB x4 = 2.048GB) DDR3
OR
ONE NVIDIA GTX 285 (1GB x1 = 1GB) GDDR3
OR
FOUR NVIDIA GT 120 (512MB x4 = 2.048GB) DDR3
The 4 GT120s offer nothing more than the ability to run up to 8 monitors at once.
The 4870 is the best Mac card that supports the mini DisplayPort without additional hardware.
The GT285 is the best Mac video card at this time.
So the GTX285 does not have a mini Display Port... Would you need to buy another DVI Link Adapter or would it come with a 30" Apple Cinema HD Display?