The performance difference between the 770 and 780 is pretty big, especially when you o/c the 780, which is fairly safe and easy to do. An O/C 460$ 780 will run right up there with the Titan, even surpass it in some ways, something the 770 cannot do. I'm not saying the 770 is bad, or even a bad deal, it's a great deal, but for another 130$ and an O/C utility, you can possess one of the fastest cards you can get with the 780. The 780 is not just an overclocked prettier 770, far from it.
And I agree with the 3 monitor for AH, I used it for a while, and went back to a single monitor for a number of reasons.