Originally Posted by SharpShoot3r07
Correct. My current Linksys wireless card is ooooooold. I've used it in 3 different builds. I never though that's something I should upgrade. Should I? I don't know what's out there for wireless adapters.
Generally speaking, 4770k with a nice board (nothing too fancy, up to 200$ or so, like Asus Hero) with 2x8GB of ram would be a good choice.
However, having in mind your needs, which is playing BF4 at 120HZ (where minimum FPS will also be important) and GTX 780SLI, you might also want to consider going for x79, with one of Asus Rampage boards (Extreme/Formula), 4930k and 4x4GB of ram.
I mean, I usually recommend z87 for gaming with up to 2 cards, so this approach would be cheaper and more "optimized". X79 if you want to go all out.
Your PCI requirement will limit your MB choice, though.