CyberPowerPC lets you configure just about every component, so if you don't want to build yourself, that's probably the way to go.
That said, I bought a prebuilt from them back in 2020 (had issues, but that was due to buying it from Best Buy when prebuilts were the only way to get 3080 cards, vs configuring it myself) and after having to go in and redo the cooling setup myself, I decided to go back to building my own rigs.
FWIW, the stuff in Win 11 that's hardware-dependent is present on any modern motherboard; if you get a Z790 chipset board or the AMD equivalent, you shouldn't have any issues. If you DO want to build yourself.
Here's links to all the parts I used for my latest build:
Cooler Master NR200P Max case(includes power supply and cooler)
MSI MPG Z790I Edge WiFi Gaming Motherboard
Intel Core i7-13700K (you could also opt for the
13900K for $160 more -- that's what I have in my full-size rig)
Corsair Vengeance DDR5 64GB (2x32GB) DDR5 5600 MHz]
WD Black SN850X 2TB m.2 SSD (the motherboard supports two m.2 PCI 4.0 m.2 drives and one PCI 3 drive; this rig wasn't primarily for MSFS and if you like add-ons like I do, I'd add a second drive for more storage)
MSI Ventus RTX 4070 TI OC (bought from Best Buy because it was $40 cheaper than the same card on Amazon)
Arctic MX-4 Thermal Paste (the case includes paste, but I like this stuff, better cooling)
Guide to free (if you have an older Windows install on a previous PC) or cheap Windows 11
https://www.tomshardware.com/reviews/get-windows-10-free-or-cheap,5717.html
It's probably the easiest build I've ever done, as the pre-installed cooler and power supply in the case mean there's very little to deal with as far as cable management, etc. The only issue I had is that you need to make sure to download the network card and RAID drivers into the USB stick you use to install Windows, because Win 11 stupidly doesn't include drivers for the latest Intel networking stuff.
I used this YouTube video as a guide just to make sure I didn't miss anything specific to this setup. If you're considering this, I'd suggest giving it a watch to see if you feel comfortable with the process. It's easy, just requires patience and making sure you plug everything in.
An even more thorough video... Note that he installs two additional case fans in the bottom; I didn't bother because they only drop temps by about 2C and they add noise.
The end result is a super-quiet, very compact, rock-stable PC at a good price. I get over 100 fps (90 in the most demanding areas) in MSFS on a 4K OLED TV. Cost was right around $2500, which was about $500-1000 less than a preconfigured PC with the same specs.
If I was building or configuring a rig for VR, I'd sub a 4080 or 4090 for the 4070Ti, since VR doesn't support DLSS3 and really benefits from the extra memory. That said, even the 4070Ti is going to a dramatic jump from what you're using now. This is my living room TV PC, and get a little MSFS usage and does great, but I have a 4090 rig I use for VR gaming in my office.
Good luck with whatever you decide to do!