AOC recently announced a high-end 43-in gaming monitor featuring a 144 Hz VA panel, HDR1000 certification, and FreeSync. The G4309VX, unfortunately, seems limited to the Chinese market for now. Furthermore, AOC's yet to offer details about pricing.
https://www.notebookcheck.net/AOC-outs-a-massive-43-inch-144-Hz-HDR1000-gaming-monitor-but-it-s-China-exclusive-for-the-moment.583392.0.html