ted123 :
spdragoo :
If you're struggling to get over 100FPS, then you might want to consider getting a GTX 1070 (if playing at 1080p) or GTX 1080/1080TI (if playing at 1440p). Fair warning, though, be prepared to spend nearly $1,000 USD (if not more) for one of those GPUs.
Would it be worth getting a second 1060 instead?
No.
SLI rarely works as you'd hope. Most games don't support it. Those that do, don't get anywhere near twice the performance from a 2nd card. Better performance to sell the 1060 and buy a faster card.
But if you are thinking about this, wait a month for the graphics card shortage to ease a little.