the jump to 144hz is AWESOME. everything is smoother. I would definitely recommend a gysnc monitor either way you go. I have the below monitor and love it. 1440p, 144hz, IPS, gsync. Acer preadator xb271hu
https://www.amazon.com/Acer-Predator-XB271HU-27-inch-Widescreen/dp/B0173PEX20/ref=sr_1_1?ie=UTF8&qid=1465576133&sr=8-1&keywords=xb271hu
Yeah I've always wondered if that was the case. I've had a friend describe it to me like using an SSD for the first time or upgrading your audio setup to an AMP+DAC. Once you use it it's hard to imagine how you ever got along without it. Would you agree?
I wish there were 4k 144hz around with g-sync. I can't really find anything.