I've been building this piece by piece over the course of 6 months and have finally come to a point where I'm happy with it. Everything runs amazingly and I have had no issues whatsoever. This case is very roomy and the system runs very cool.
If you're wondering if the 20 series is worth it I would say yes! I'm coming from a 1060 6g and it's a night and day difference.
One of my favorite parts of the build is the 34" ultra-wide monitor. If you haven't played on one of these things I highly suggest you do.
I still plan on doing some upgrades in the future but I've finally come to a point where I'm happy with this system.
Future upgrades: Motherboard, 32g RAM, i7/ i9 Processor