Here is another data point. I built my rig the day after I got my hands on the just released AMD 7950X3d CPU (March 2023)…
CPU - AMD Ryzen 9 7950X3d
MB - ASRock AM5 X670E Taichi
GPU - Zotac Trinity OC RTX 4090
RAM - GSkill Trident Z5 RGB DDR5-5600 64GB (2x32GB)
Storage - WD Black SN850X NVMe PCIe 4.0 M.2 SSD 2TB (x2)
Storage - Crucial MX500 SSD SATA III 4TB (for longer-term non-game storage)
Storage - Corsair Force MP510 NVMe PCIe 3.0 M.2 SSD 480GB (this is for the Windows OS) (I already had this on hand from a previous build that I wound up not using there so used it here.)
so total storage 8.48 TB
Case - Cooler Master HAF700 EVO
CPU Cooling - Cooler Master MasterLiquid PL360 Flux AIO
Power Supply - ASUS ROG Thor Platinum II 1000 W ATX-form
All in: $5278 US. I could have gone for a less ostentatious case and saved another $300-400, but the other parts are rock solid. The single most expensive part, unsurprisingly was the GPU, but I definitely subscribe to the philosophy of “When in doubt, buy the highest level product you can afford.” My choices were informed by my past issues with earlier versions of MSFS that suffered from weak hardware (and much more limited means!)
It took me all day to build it, but have not looked back since. With my rig, too, MSFS runs butter-smooth at Ultra settings and CPU temps in the 40-mid 50’s range (C). If you can, just get the parts and build it yourself as opposed to having a store build it for you. Not only will you get the satisfaction of saving money and DIY, but you will know intimately what upgrade possibilities lie ahead, though with this kind of setup that may not be for years.