Yep its great go for it if you dont mind spending extra i guess
If you want a 1440p non ultrawidde go for either Asus VG27QAL1A, Dell S2722DGM or Gigabyte M27Q-P. The 2nd one is a VA panel which will be your best budget option and if you don't care about response time being slower than IPS then it can look better in non competitive games and the 3rd being cheaper ips option
are you fully committing to the white aesthetic? cause black fans cpu cooler and power supply. Anyway id remove the extra thermal paste because you dont need it. i'd switch the power supply too because it has bad coil whine
For a $1300 build you should be on AM5 playing at 1440p with no issues.
https://pcpartpicker.com/list/xkBdmD
Motherboard: Pretty much one of the cheapest options with wifi.
Cheaper and still very good storage more than enough of your needs.
GPU general rule of thumb is to go for the cheapest AIB (version), its black/silver so if you want can get pure black for 10 dollars more.
Case in general is personal preference but you choose a way too expensive one for no reason, this one is a smol like the matx you chose and really nice in my opinion
PSU is pretty much one of the cheapest high ends, you can save 20 dollars or so by getting a C or B rated.
Yep ๐ my bad