LG is a little better for motion and consoles, Dell slightly better for HDR. Buy from a store with a good return policy because both have quality control issues.
Wide gamut = oversaturated and inaccurate colours when displaying sRGB content if lacking colour-gamut conversion function. Eizo should have an good sRGB mode.
1. VA monitors have good blacks, for an LCD, but VA is bad at motion (some transitions) so your options are very limited to IPS with Advanced True Wide polarizer. Eizo makes such monitors like the ColorEdge series including the older, yours, CX241. Unfortunately this monitors are wide gamut so...
DisplayPort 1.4 = DisplayPort 1.3 plus data compression (doesn’t increase the overall transmission bandwidth). All GPUs with support for DP 1.3 will support DP 1.4. The market will jump from DP 1.2 to 1.4, skipping DP 1.3 entirely.