I currently have a gtx 770 2gb video card and BenQ 24 inch monitor. I think I want to buy (when I can find it) a Asus RoG Swift PG278Q monitor. When I buy it, I would like to add some more video card power. Should I add another GTX 770 in SLI, get a GTX 780 with 6gb of vram, or go for a GTX 780 ti? If anyone has any feedback on my choice of monitor or advice on the video card situation, I would really appreciate it.