So about 2 months ago I built my PC (i7-4790k, MAXIMUS VII HERO, ASUS DirectCU II GTX 780) and I was planning on SLI'ing 780s. I am wondering if I should just get rid of my 780 and buy a 980.
I would say the 780 way as their prices are rapidly dropping because they are not in production anymore. Then, after a a few years, sell your 2 780s and get whatever the latest GPU you can afford.