New SFF build

[Devilwrath]

So I got quite "old" PC including ryzen 5 3600 and x370 asrock motherboard. I decided to upgrade a whole system to new ryzen 5000. Have been researching for a past week best parts for new small form factor PC.
I decided to go with Lian Li Tu150 case. I`ll try to utilise components I aleady got from previous PC, including SSD and RAM.
Rest of spec I want to get:

New Ryzen 5000 best for gaming in 3440x1440 @100Hz.
ROG STRIX B550-I GAMING
Corsair SFX series SF600
Corsair Vengeance LPX DDR4, 2x8GB, 3200MHz, CL16 (owned)
Sabrent 1TB Rocket NVMe PCIe M.2 2280 SSD (owned)
Dark Rock 4 CPU Cooler (owned)
+ some Silent Wings 3 120cm fans for cooler and case.

What are your thoughts?
my priorites are great audio, good gaming at 3440x1440 @100Hz, most quiet components as I can get.
Which GPU should I get for that resolution.

 

[Rei]

Depends on your budget & how long do you want your GPU to last. As it is right now, my current recommendation is 3070 or wait for 3060.
What monitor are you using?

 

[Devilwrath]

I use ACER 34" XR342CK. Budget around 500 usd, I`ll try to find nice deal on black friday. Also 600W is a cap I dont want to hit.

 

[Rei]

You mean 600W on the PSU side?

Yeah, future-proof yourself & get a 3070 then. I dunno when is Black Friday though.