I can assume this mb will work for crossfire of the 6970's? GIGABYTE GA-Z68XP-UD3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
I keep reading that not all games benefit from crossfire. That would suck if Im building this specifically for bf3 and it wont?
well, all the modern games benefit from CF and SLI, most of CF / SLI issues are related to drivers and hardware configurations.
You said you're going to Eyefinity, and no way... you need a CF setup in order not to experience a lag of FPS when running such games in a such higher resolution 5760x
if you don't wanna feel the hassle from CF / SLI issues so a Dual GPU is your best option.