GTX680 or HD7970?

2 . I think Would be better, Due to i7 2700K. That and GTX680 would just be great.

x79 platform is useless for gaming

Take either the i7 2700K or get your hands on some newer Ivy Bridge CPU.
8GB RAM should be enough for gaming, all the time I spend in BF3 I never used more than 6GB or so. As long as you don't do any Photo / Video editing it should be enough but then again, it's super cheap at the moment.
You might want to pay attention to XMP-Profile RAM, just in case you ever need to boost it a little ... Intel® Extreme Memory Profile - Intel® XMP

Your Mainboard should be a Z68 one as it makes overclocking your CPU much more easy!

OCZ is not my favourite SSD by the way, you might want to check out some recent Crucial or Samsung!

I agree with 2. The performance gain from the 3960x over 2700k is miniscule, and you save $500+. You also don't need the 16GB RAM either IMO but it doesn't really matter.

Good luck finding an available 680 that isn't jacked up in price due to their lack of availability elsewhere. I recommend the 670, it should be easier to find, and is ~$400, and performs damn near close to the 680 for $100 less, while beating the 7970 at times. Also, there's no need for you to get the 3960x, you'll see barely, if any performance increase in gaming between a 2700k and 3960x, and even for things like video encoding/rendering, while the 3960x is no doubt better for it, it doesn't mean the 2700k can't hold its own. So yea, 670, and your choice #2.

Nvidia cards are usually extremely power hungry compared to AMD, so AMD is a lot cheaper in the long run.

I doubt triple monitor would come so popular that companies will always have to support it. Most people don't have the space or money for it. (Steam hardware survey only shows the res of people with Multi-monitors, Not how many people have.)

+1 to both.

bought my pc 5+ years ago with a GT 8800 on

still runs well even on recent titles

when the drivers are more mature the 680 will likely be faster lol

I yet have to experience an issue with AMD's drivers. I can't say the same for Nvidia, though. My brother and I have had 5 different Nvidia graphic cards (5200, 5500, 6200, 7600GT, GTX275) over the last few years and despite having tried about 5 different versions of Nvidia's drivers with each one and multiple setups, we still ran into plenty of BSODs caused by their cursed drivers. After experiencing the same with the GTX275, we lost all faith in Nvidia's products and switched over to AMD, which is a decision we don't regret at all.