Nice purchase! :thumbsup:
I personally went with an Asus ROG Swift PG279Q, got it for sale on black friday for $599. Was thinking about going with the Acer one, which was for $100 cheaper, but settled on Asus because they have better support than Acer(which is a company that is bleeding cash, the two are not unrelated!).
Also, Asus happens to have a service center in my city for all of Sweden, so I can just take my monitor there physically and pick it up with my car if need be. That's important because a lot of these bleeding edge monitors are having a lot of QC issues. I've heard good things about the PG279Q but you can never be too careful.
My current monitor is a 144 Hz TN panel at 24"(1080p), so I'm upgrading just about everything except the refresh rate. I'm personally not hugely hyped about G-Sync, even if I of course enjoy it. I've tried it but ULMB for me is a bigger deal. I plan on going G-Sync for 1440p and downscale to 1080p with ULMB for those games where it matters more.
Even if there are a ton of new monitors announced at CES I'm not going to buy them next year. I've learned you need to wait for the tech to mature for at least a year. The original ROG Swift had massive issues in the beginning. Now it's much better. The first IPS 144 Hz panels were similarily problematic. Now it's improving fast.