I'm currently looking to upgrade my current GPU (GTX 980s SLI), and either looking to get 2 1080ti's for around $1200-1400 or run a single GPU with theTitan XP for $1200. What would you guys recommend??? I'm pretty set with Nvidia cards, and with all the problems SLI has been causing in games lately, I'm not sure if I want to stay on board or move to a single GPU.