With surround all monitors need to have the same resolution. I aspect although you can use for example 2 monitors with 60hz and 1 with 120hz, all will be set to 60hz when you activate surround mode. I would suggest that for video editing or any other desktop use you activate extended desktop.
Thanks, and that leads me to my next question. The monitor I have now is 16:10 ratio, 1680x1050 @60Hz, and it's running through the DVI port. If I ran three monitors, one would have to run off of the card's HDMI port.
So my next question is over which'd be better:
buy two more 16:10 monitors of the above specs, and run them through the DVI and HDMI ports,
or buy three 16:9 monitors that run at 1920x1080, and run them through the HDMI and DVI ports.