If you really want to commit to a monitor like that, at least go with the G9 Neo that replaced the original G9, which didn't have local dimming.
Personally I would never pay that much for a gaming display that has a mere VA panel, but that's just me. I mean, it's still the same old LCD technology that's prone to motion blur, so it's hard to imagine the super high refresh rate is really going to make up for it. And while VAs have deep blacks, OLEDs have deep blacks AND very accurate colors AND very subtle gradients from black to grey, with literally no motion blur.
Aside from that, what seems really strange is you appear to be dead locked on a particularly high end and very niche monitor, yet you want to leave literally ALL of the PC component picking that drives it up to complete strangers. If you've at some point done a fair bit of research to nail down that display choice, I have to ask, what has kept you from doing the same on the PC parts?
Lastly, picking parts for you is going to be like a shot in the dark guessing game unless you give us some kind of idea of what games you'll be playing.