I'm currently planning out a new build and was looking at a 1660 ti for the build since I'm still running a GTX 960 and it's a sizeable upgrade and I've had good experiences with my Nvidia cards. I also got a good deal on a new monitor a few months ago and got a 1440p, 144MHz refresh, 1ms response time monitor with Gsync.
My conundrum is that the new Radeon cards are looking pretty competitive from what I can see and I'm not sure if I should sacrifice Gsync if I get a good deal on a Radeon card, or should I stick to Nvidia and take advantage of the Gsync?