My only suggestions (and apologies if this has already been covered - I’ve skipped reading the previous 200-odd posts):
A) Consider upgrading the power supply to 1000 W if there is not a significant price increase to do that. That will provide a good buffer today & perhaps allow a GPU upgrade in 2-3 years without having to purchase a new PSU at the same time. Every new GPU model seems to want more power!
B) Check - if you have not already done so - that the memory you have chosen is compatible with the motherboard.
C) Consider purchasing an additional 1 TB M2 Drive. Put the OS on that, and MSFS on the 2 TB. Not essential, but makes backups & restores simpler. Depending upon how fast MSFS downloads to your system (it appears to vary widely depending upon where you live), restoring from backup may be far faster than re-installing if MSFS goes belly-up on you.
D) Consider purchasing an inexpensive 2 or 4TB HDD - or use an existing one if you have one - purely as an archive / backup drive. Speed / performance of the drive is not that important as it will only be read / written to occasionally - maybe once a week or once a month, when you do those backups. This allows apps & files you use on a daily basis to reside on the much faster SSDs. There is no point (IMO) in paying a premium price over HHDs for SSD performance if you rarely access the data on the SSD.
e) Your list does not mention monitors or cables. You need to think about that now, before purchasing your PC. Understand how you intend to connect your monitor(s) to your GPU - and what cables you need to ensure you can run at the resolution & refresh rates you want. For an example of what I’m taking about, have a look at this thread.
Hope this helps!