I can get a system with an i7 7700 and a gtx 1080ti
or for the same price I can get a system with an i7 7700k and a gtx 1080
Which is the better option for gaming?
I do not plan to do any overclocking.
There's about a $200 price difference between those card. You found an incredible deal. As long as this is from a reputable site the 1080Ti is the easy choice.