Advantages and disadvantages of a hard tubed custom water cooling system?

Hi, I'd like to get a PC with, among other things, a 4090, 7950X3D, 13900K, or 7800X3D. I'm still a bit unsure about the CPU… But my question is, what exactly are the advantages of a custom water cooling system like the one shown in the attached image? Does it cool better? Is it quieter…

What upgrade options are available for this PC (see picture)?

Hello, I recently upgraded my gaming PC with a new high-end graphics card (still needs to be installed). Do you have any suggestions on what I could improve before I install the new graphics card? And do you have any experience with how newer video games will run on the thing with the new graphics…