Since my R9 290 died; I am in need of a gpu. I will be playing at 1080p. 1070 is a overkill for 1080p but its more futureproof. I want to know which will give a smoother gameplay ? A GTX 1070 with my current 1080p 60hz monitor or a RX 580 with a new 1080p 60hz freesync monitor since there are many cheap ones in the market. thanks.