I have the Asus Rog Swift monitor with G-Sync (also 144hz)
I fucking hate screen tearing with a passion, and this is the solution. Not only that, but it makes your perceived frame rate higher as well. Games just appear to run a hell of a lot more smoothly with it.
The latest nvidia drivers had fucked with my g-sync quite badly in the sense that it wouldn't switch on at all. I tried playing without it cos I couldn't be fucked diagnosing the problem at the time, but it was just horrible - especially at 60hz which is what the drivers kept resetting my monitor to. Switching to 144hz improved but there was still noticeable tearing, especially in slower moving games. Rolled back and that fixed it.
Slightly off topic - I also had the Acer 4K g-sync for a while, to compare the two (I actually had that first). 4K is jaw-droppingly beautiful but I couldn't handle the 60fps limit. It also destroyed the immersion of some older games that were never designed to be seen in 4k. Deus Ex HR made my eyes wretch in horror, although t doesn't look so terrible at 2560x1440. Alien Isolation on the other hand looks great at both resolutions.
I would say get a G-Sync monitor if you can afford it.