Judging by amd choice, I’m guessing you probably have a 2k free sync monitor, if not, I suggest to get 1070ti as the price for Nvidia cards has returned close to msrp, not so much with amd cards. Pure AMD card wise, I would say Vega 56 a better buy, however right now the price for amd cards are all over the place, if you honestly need of a amd gpu, would honestly suggest you a single rx580.