There are a lot of good inputs in this threads, I agree with them: going for the 7800X3D will be a good investment and it will last you longer.
I would look into maybe saving money on the case, I think Corsair may have cheaper ones (and actually easier to access).
For memory, 64GB is hardly required unless you know you need it (heck, I have 196gb).
This current version of Ryzen is also hard to get with faster memory if you do more than 2 sticks, I know someone mentioned adding more memory later, but it may not be possible if you would like to keep the speed.
Monitor wise, 144, 165hz won’t really make a difference. You must decide on the resolution, capabilities (HDR) and etc. I went with 3x Innocn 32M2V, they have some issues but are perfect for what I need. Unfortunately, to drive the monitors, you need a fairly good graphics card to play at 4k with everything turned up. At 2560x1440 I think your graphics card is the right one (I just think 32" 1440p is too much, but that’s my personal opinion).
Good luck!
Never knew this was an option, thanks for sharing.