Well, what else do you expect, an MSI tool recommending an MSI card instead of an ASUS...
Graphics cards are universally compatible, the ASUS is
good, so all is well there.
The board, you don't have that much choice if you want a nice one with the headers on the rear (Project Zero) and in white.
The AIO, ever since the
original CoreLiquid AIO disaster where it was prone to a fatal sludge buildup, I don't trust them too much anymore.
This is clearly superior,
https://www.arctic.de/en/Liquid-Freezer-III-Pro-360-ARGB-White/ACFRE00188A
As for the PSU, again, they are universally compatible, no need to go for an MSI part. But sure, the MSI MAG A850GL would be decent. And I guess you might want a white PSU as well, to match some of the rest, so again, other options are limited anyways.
However, whatever I can write here has little impact if you already ordered everything. Normally, you ask in a forum first, then people can give comments about your choices, then you draw your conclusions and order things.
But now that the parts are on the way: Yes, it's decent, don't worry about the GPU, PSU or RAM too much. The PSU doesn't even communicate with the board, so it only matters that it's a high-quality model, but the brand doesn't matter.
The RAM kit is a popular one and the speed is in the sweet spot, so it should work. But update your BIOS to the latest version, before even installing Windows, to prevent trouble.