Yeah dude, you wanna go with ASUS because if you ever plan on using 2 graphics cards at some point, this MOBO will let you use 2 x16 channels and not one x16 and one shared x16 like the other motherboard from gigabyte
They are both good motherboards, but are expensive enthusiast boards. What features do you need that only these motherboards provide?
Realize that your cpu will run at about the same speed an ANY X58 motherboard. Any X58 motherboard can overclock to safe levels.
If your interest is in record seeking overclocks, then by all means get the best.
If your interest is some insane 3 or 4 card sli/crossfire configuration, go to it.