Hey all ... I'm kinda up and running now so thought I'd do a very quick update.
The good news is that I can crank every single Odyssey graphics detail to Ultra/max, push all the sliders all the way to the right, run at 1.5x oversampling to reduce aliasing effects and still run the game at 144 fps pretty much all the time in space, and stay above 100 fps on the ground and at settlements, with the PC seemingly hardly breaking a sweat. And the case looks gorgeous!
The bad news I guess is that it has taken an absolute age to get the dozens and dozens of app's I had on the old PC (everything from mail readers, print drivers and favourite Windows utilities to joystick/head tracking software and numerous 3rd party apps like voice attack, ED CoPilot, Elite Observatory, etc, etc - not forgetting the basic move from Windows 10 to Windows 11) up and running the way I like and with all my old config's in place. Still a few things left but nearly there now I guess. I personally find this side of an upgrade incredibly stressful and I can't deny it has taken the edge off my enjoyment of this whole experience.
I do have some slight regrets about the build. The two things I compromised on as the price crept up were storage and USB slots and I wish I'd just spent the extra on both up front. I've used up all the standard USB slots on the rear and I will definitely be adding more storage at some point in the near future. Oh well. I suppose that was always kinda the plan.
And now to the most significant problem (in case anyone has any brilliant suggestions).
There's definitely something wrong in the area of the USB devices. The joystick (just a Thrustmaster Hotas 4) frequently just stops working. Originally it was so bad (and not just the joystick but also the Track IR device) that I followed some online advice about manually uninstalling all the USB 3.0 drivers in order to get Windows to reinstall the latest drivers (a process which stupidly left me with no working keyboard or mouse for a while and a complete panic that I'd killed my new PC before I'd even started). Luckily I did get the drivers back again. It's still not right tho. I had to reboot twice this morning when my joystick just stopped working mid session. The single most reproducible symptom of this is that if I start the Windows "Setup USB game controllers" dialog, the window with the list of controllers opens but is then immediately unresponsive and typically remains that way for several minutes after which my joystick then works. I also have a problem with my HP printer (again USB connected) which, although it prints, pops up a dialog as it's doing so saying it can't communicate with the printer. The PC also feels quite slow to boot and I can't help wondering if it's the same issue ... some kind of timeout while it tries to talk to unresponsive USB devices during startup? At the weekend I'm going to transfer a 4xUSB3.0 PCIe card from my old PC - a) to give me some leg room re: spare slots and b) to spread my USB load across more controllers (that's a thing right?) in the hope of fixing this situation. It will be an old card tho. Does that matter? Are there good and bad PCIe USB cards, can I get something more modern that's likely to be more reliable? Are there USB diagnostics I can run? I guess I'll be talking to PC Specialist about all this too.
Anyway, I thought I'd report back as PC upgrades are an interesting topic and one which doesn't end when you make your purchase.