AMD Radeon R9 270

Hello everyone, First time posting in this forum since I feel I am at a point I need some expert advice/cumulative brain power from the internet. Fingers crossed :) I have an Alienware Aurora (bought around in 2014ish) that has Dual AMD Radeon R9 270 with 4GB (2 x 2GB) GDDR5 - Crossfire...

I am building a new computer from scratch. I currently have an ASUS Led 24' 1080p 75hz monitor. I have the chance to upgrade to BenQ Zowie 24" 144Hz, 16:9 Aspect Ratio e-Sports Monitor. If I get the monitor, I am buying a GTX 1060 3gb. If I keep my current monitor, I can get a GTX 1070. I...