Asaltnado

The NH-D15 comes with NT-H1 which is already excellent. I'd recommend using that and only replacing it is you're not satisfied with the results.

MSI Optix MAG27CQ - the best purchase I've ever made.
G-Sync compatibility has issues in some games, but you won't ever notice tearing at 144+ fps... if you reach that
The screen is beautiful, lots of workspace, more details in games, sharp colours, minimal ghosting (only visible in UFO test).
 
The only annoying thing is it's "sleep mode".
It keeps blinking this blue light at night so I either have to turn off the monitor completely from the back (inconvenient positioning) or put something in front of the light to block it when I sleep.

Go with one of the Z390 Aorus boards, they're all rock-solid choices. Everything else looks good.

Osborne 1 ?wow so I take it you've been around computers all your life? Truly I'm still figuring out everything, I had other things that had to come first unfortunately so I'm really far behind. For software no idea yet ? I'm trying to do as much research from the ground up. Basically learning everything all over again except on a whole different scale. Video editing whill just compose of gaming and usually can put in a 12hr+ day. So probably do a game day then a editing day or 50/50. Right now on console I'm just using twitch. I deffiantly plan to expand but I have a very outdated laptop that is a pain setting up profile pages and links stuff like that. Eventually I would like to help do build guides and mabey even design and modifaction guides to makes parts better. But that's way in the future gotta crawl first.