all of that sounds good to me though with how close prices between a 850w power supply and a 1000w are id go with the 1000w actually recently upgraded to a 3080ti went with the rog strix card many other cards suffer with bad sagging due to poor design.
850w is usually the recommended minimum wattage power supply for a 3080ti.
Also make sure PSU has the 3 power connectors for the GPU.
If you plan to use your pc for more than just msfs then you might want to get an additional 1 or 2 tb SSD, as it fairly quickly fills up with size of games these days.
As for the next series of GPU it’s suggested their could be similar issue’s with supply and demand again so prices could be sky high again.
Personally think unless 8k gaming becomes a common thing I’m quite happy with the performance from the 3080ti for 4k.