Get another 770 and use them in SLI, otherwise you won't runt it, and as
medeiros deathmask stated, you'll also need more RAM.
More Seriously. Are you showing off or what? i7, 770, 16gb. I hate people like you, that are trying to be "supa dupa cool".
Edit: On the other hand, don't mind that "more" content. If they fuck it up just like GTA IV, you actually might need to upgrade.