your post was very clear. im sorry i have not been very detailed with my answer.
you want a setup capable of 2k15 and your solution is for either a new amd or intel setup. i have recommended an upgrade on the video card while maintaining your current setup. i could have recommended a whole new setup but since you did not indicate your budget, i recommended otherwise. BUT, either way, i still would have given a setup with a capable video card kay diha man gud mag-agad kung unsa nga games imo maduwa sa imo system. second ra ang processor.
I dont know what your current specs are but whatever the setup may be, adding a modest video card will improve the gaming capability. There might be bottleneck in the procie but the improvement will still be in exponential scales. Mopalit ra man ka ug video card either way so unaha lang to. 750ti is my best bet since wala nimo gi sulti unsa imo psu and budget.
Kung wala ka makuntento sa changes, baliki lang mi then tell me i wrong. (mo sorry ra man gud ko.

) jk.
Seriously, ana lang sa.