Question Which psu should i choose?

May 5, 2021
Hi, I'm from Argentina, first time i write even though i have used Tom's Hardware as a reference page before buying any computer part for years. This is the situation, I have an old computer (from 2010, my first pc), although now I no longer use it to play games (the last game I played was Deus Ex: Human Revolution in 2015) I use it every day for many things, up to 16 hours a day. A few days ago the power supply a Seasonic S12II 520W stopped working, (all the other components are fine).

After looking at what psu are available in my country, and considering how much I can spend, I chose two psu and I can't decide which I should buy.
I am between the Corsair CX550 and the be quiet! System Power U9 500W.

My specs:
Motherboard: Intel DG41TY
CPU: Intel Core 2 Duo E7500
RAM: Kingston DDR2 2x2GB
Storage: WD 500 GB Blue
PGU: MSI GT730 2GD3 V3 PCI-Express 2.0
DVD+RW Dual Layer LG GH22NS50
4 fans (3x80mm and 1x120mm)

As a reference, other power supplies that are currently in the Argentine market within the price range of those mentioned above are:
Corsair CV 450W 550 W and 650W
Corsair VS 500W and 600W
Thermaltake Smart 500W 600W and 700W
Gigabyte P450B P550B and P650B
Seasonic A12 500W 600W and 700W
Asus TUF 550B


So which one would you buy? Any suggestions or recommendations ?