mmmm tough one, I was in sort of the same situation not long back and went with a 144hz 1080p gsync monitor, I think if you were going to go up resolution like to 1440p etc you would defo be better off getting a gsync monitor but that would be quite a bit over your budget, imo it would be a mistake to go higher res than 1080p with your 970 unless it was a gsync monitor