I just bought two MSI 4GB of the 770's and they are pretty fast and really quiet. My decision was based on performance for 3D Vision. A single 780 couldn´t handle this requirement on it´s own and two 780 in SLi would cost 400 bucks more. So the GTX770 is a very good option. ~40% more Performance than a stock 780, 1Gig more VRAM and 25% more power consumption.
If you are not sensible to microstuttering this should be a good option for a three 23" Monitor-setup. If you want some Numbers (benches, wattage etc...) ask me. I have a lot of games