For...?
1440p/165Hz is going to be quite demanding on a 2060 for gaming, unless you're strictly talking eSports and the like...
what you recommend?
What are you doing with the system? If gaming, what games?
Do I need a better monitor if I buy RTX 2060?
I've currently got XB271HU Predator Monitor
Resolution - 2560 x 1440
refresh rate - 165 Hz
bit depth - 8-bit
color format - RGB
If you buy a RTX 2060, its not going to be powerful enough to drive a 1440p monitor at 165 Hz. You don't need a better monitor my friend, you need a better GPU.
what do you suggest?