4k monitor suggestions?

Which one do you have? Share some pros/cons etc etc. Shopping around for 4k monitor so suggestions welcomed. 

Acer B286HK 28" - $499.99

Or

AOC U2868PQU 28" - $449.99

Pros of Acer Monitor:

  • More Display Colors
  • Higher Contrast Ratio
 
 
Pros of AOC Monitor:
  • Lower Response Time
  • Lower Price