LordVi :
ok so it'll be fine if get a GTX 980ti and a 4K monitor ??
Yes but for high end graphics you may be better off to wait a few months for Pascal which is supposed to be very powerful.
http://wccftech.com/nvidia-pascal-gpu-gtc-2015/
If you don't want to wait, the GTX 980 ti is still a solid choice.