ok, if you are not looking to play games like call of duty then 60hz will be fine, if you were planning on gaming then i would recommend going with at least a 120hz monitor. the AOC and BENQ are both IPS montors so they allow for more viewing angles than the others.
TN (Twisted Nematic) panels: They offer fast response times and low prices, but have poor color accuracy and viewing angles.
IPS (In-Plane Switching) panels: They have more accurate colors and better viewing angles, but are more expensive and slower than TN panels.
VA (Vertical Alignment) panels: They have high contrast ratios and good colors, but suffer from ghosting and color shifting.
OLED (Organic Light-Emitting Diode) panels: They are the newest type of panels, with high brightness, contrast, and color gamut, but are not widely used in computer monitors yet.