Build help, first time building a PC :)

[Denouermont]

Budget (including currency): 1,630–2,500 USD

Country: USA

Games, programs or workloads that it will be used for: Affinity Suite, DaVinci Resolve, Blender, maybe gaming (Overwatch, Valorant, Xbox Series X exclusives I can't get on PS5).

Other details: 
The intent is for architecture student work and content creation.
I need a monitor included in the budget, I already have a mouse and keyboard.
I may want a trackpad as well (Apple Magic Trackpad 2) though I can always get one later.
The goal is to supplement my 2016 13" base model MacBook Pro, moving my school and creative productivity to the PC. 
The competition is the new M1 iMac, thus the matching $1,630 target budget—though I'm willing to go over to reach a comparable level of performance, quality, and compactness.
For example, the monitor must be at least 4K to approximate the 4.5K iMac display, and have a similar level of color accuracy.

 

Parts List I came up with:

Monitor: LG 4K 27" 27UK650-W $400

 

Case: Louqe Ghost S1 $295

CPU: Ryzen 5 5600X $280

Cooler: Noctua-L12 Ghost S1 edition $55

GPU: RTX 3060 Ti $400

Motherboard: ROG Strix B550-I mini ITX $210

PSU: NZT C650 $110

RAM: Corsair Vengeance 2x8gb LPX 16 DDR4–3600 $93

M.2 storage: Western Digital Black SN750 500gb $70

Case Fan: Noctua A12x15 FLX $26

 

Total: $1,939

 

Some Questions I Have: 

What is the difference between Noctua's FLX and PWM fans? Will I even need a case fan?

What is the difference between motherboards? For example, what does the "B550" refer to?

It is my understanding that built–in wifi on a motherboard just means it has wifi capability and a separate antenna that has to be placed on the desk somewhere.
Are there cleaner solutions, antennas that plug into the back, or stay inside the case? I know Ethernet is an option, I would have to run the cables myself through the attic.

I'd of course appreciate possible solutions for the GPU problem. Are there some cheap cards I could use temporarily,
or would it make sense to wait for a Ryzen 5 3600G?

Any other case recommendations?

Any other monitor recommendations?

What options are there for getting the build down to $1600-1700? Or even lower?

 

 

[Freakwise]

if you dont have a space problem i suggest to change the case and motherboard form factor to matx or standard atx because mini itx board tend to be more expensive and having limited future uogradeability

and b550 is refer to the chipset type the motherboard use

[cm992]

That B550 motherboard is good, the important feature to note is that it supports the full bandwidth for RTX 3000 cards as well as a PCIe4 M.2 SSD.

You don't need to install the antenna but you might get a crappy connection if you don't, luckily the antenna with that motherboard has a magnetic base so you can just stick it to the a side of your case where its metal and bend the antenna 90 degrees so it can be relatively hidden.

You could look for deals on used parts. The GPU market is difficult right now but since you need it for workstation reasons you can't really avoid that. Maybe look for a 3060 instead of a 3060ti, there is a relativelty cheap evga option there but watch out because one doesn't have a backplate and one does.

[Denouermont]

Thanks for the info on motherboards and the antenna!

I'll check around for the evga you mentioned, what's the difference between backplate or no backplate?