Ok i'm not tech minded so i need a straight answer 
I want a new monitor, i currently have a 1080 27" which is mainly used for gaming (Rift atm) would i get more benifit from increased resolution or increased Hz.
things i'm looking to improve are motion blur in fast moving warfronts (BG's) and increased detail @ 27" now i know i cant have both, so i guess the question is would i get more benifit from 120Hz or 1440 res ?
Thanks for your thoughts

I want a new monitor, i currently have a 1080 27" which is mainly used for gaming (Rift atm) would i get more benifit from increased resolution or increased Hz.
things i'm looking to improve are motion blur in fast moving warfronts (BG's) and increased detail @ 27" now i know i cant have both, so i guess the question is would i get more benifit from 120Hz or 1440 res ?
Thanks for your thoughts