Hello 10 forums!

I'm listing my current rig (be amazed, be very amazed), my early upgrade, my future upgrade, and my current monitors and future monitors.
I will also tell you what I'm using it for.

Current rig
Case: Antec Twelve Hundred (first edition)
Motherboard: MSI Z77A-GD65
CPU: Intel i7-3770K (delidded and OC'd to 4.5 GHz)
CPU cooler: Cooler Master Hyper 212X
RAM: 16 GB Corsair 1600 MHz (Can't remember the timings 'nor the exact model)
GPU: Aorus GTX 1660 Ti
PSU: XFX 650W (Can't remember the exact model)
System disk: Samsung 860 EVO 1 TB
Storage disk(s): 1 x Seagate Barracuda 1 TB & 1 x Seagate Barracuda 4 TB.

Early rig
Case: Reuse of the Antec Twelve Hundred
Motherboard: Whatever cheap one I can get.
CPU: AMD Ryzen 5 3600
CPU cooler: Stock
RAM: 16 or 32 GB og 3600 MHz of G.Skill Flare X, FORTIS or Trident Z
GPU: Reuse of the Aorus GTX 1660 Ti
PSU: Reuse of the XFX 650W
System disk: Reuse of the Samsung 860 EVO 1 TB
Storage disk(s): the 1 and 4 TB Seagate Barracuda.

Future rig
Case: Inter Tech X-908 Infini2
Motherboard: Probably a Gigabyte one, with PCIe 4.
CPU: AMD Ryzen 9 3950X
CPU cooler: Noctua NH-D15 or Noctua NH-D15 SE-AM4 in Chromax black.
RAM: 32 GB of 3600 MHz from G.Skill (64 GB would be the dream)
GPU: Not sure what the market is a year from now, so there's no clear answer yet.
PSU: Some Tier A+ (Ultra High-end) or Tier A (High-end)
System disk: Samsung 970 Pro 1 TB
Storage disk(s): Not sure if I want or need or want one.

1 x BenQ GL2450 (1080p, 24" TN panel, 60 Hz, 5 ms response time)
2 x BenQ G2420HDB (1080p, 24" LCD monitor, 60 Hz, 2 ms response time)*
*Not sure about the exact specs since they're old AF.

Sometime in between "Early rig" and "Future rig" I'm thinking something like this:
Primary monitor: Asus TUF Gaming VG27AQ (1440p, 27" IPS panel, up to 165 Hz, 1 ms response time, and a bunch of other things)
2 x something that looks similar to the primary one (physically), either in 1080p or 1440p.
I'm using the secondary monitors vertically atm.

I'm planning on using most of my current rig to run unRAID as a media server whenever I have what I need to build the "Future rig".
Right now, I'm using my current system for everything. Gaming, streaming, and as a media server, so It's a tough one for it since i'ts quite old.

I'm also thinking about doing a custom loop at a later point, for ultra silence (I like my stuff to be silence, and trust me, it's not right now)
I've also thought about changing the fans in my case for more quiet ones so it doesn't sound like an helicopter when I turn it on.

What I'm having the most issues with, is the motherboard and PSU.
For the motherboard part, I can't decide which one. And for the PSU one, I'm having a hard time finding a decent price, but still a good PSU.

What do you think of my plans for my rig and my thoughts about it?
I did ask my friends, but they usually say, (the cheapest one), and I do care a bit about aesthetics , but I'm willing to compromise on it for a gain on performance.