Win11. Im guessing once Win12 arrives Win11 users might be able to migrate (if you wanted to) for free, probably not so much for current Win10 users that remained, like me. Not sure Win10 users can still upgrade to 11 for free anymore.
I had a buggy Win 11 install USB, so i made a Win 10 installer using Rufus. I used the Win 11 key because i read enough information online that convinced me the keys are interchangeable. They are. I have done the Win 10 installation with no problems, let Windows Update install all updates for Win 10. It took a couple of days for all of them to be offered, but interestingly the upgrade to Win 11 was not offered for almost a week. Mode me wonder, but at least i had a usable OS.
Eventually the upgrade to 11 was offered and i let Windows Update handle it. Went without a hitch. If there are any unwanted Win 10 leftovers, i am not aware of them. Windows Update kept a Win 10 backup in case i wanted to go back. I eventually deleted that because i wanted Win 11.
So, why not take a look at Windows Update and see if the upgrade to 11 is available? At least the option to check compatibility with Win 11 should be there.
As aggressively as Microsoft is urging migrating to 11, i would be surprised if the option wasn't there. At least for a PC that meets requirements.
Unless you meant once Win 12 arrives, Win 10 users will be left out and have no upgrade path from 10 to 11 and then 12. May be, who knows. But there should be plenty of warning it will be that way.
On the surface, it may look likeW10 and 11 are same but they are not.
Since they are superficialy the same, and 11 offers better compatibility and has a longer future, for the same memory usage and storage space required no less, it should be a no-brainer as to which OS to pick.
If it's a matter of cosmetics and visuals, there are tools like Stardock Start 11 or Winaero tweaker that can customize the look and feel of the UI beyond what Win 11 offers.
If it's a problem of Microsoft never being able to roll out an OS without screwing up something basic and almost impossible to screw up, live with it. The 5% of inconvenience does not outweigh the 95% of a fast, modern, secure*, and compatible OS. Compatible with not just hardware but the majority of software.
Linux is an alternative and so is Mac, but both have their own shortcomings and plenty of idiocy as well.
You can save like 65$ by getting phantom spirit cooler, it's just as good for that CPU ( and it doesnt get very hot anyway). And another 30$ or so by getting 6000 ram.
I will say this about the Noctua. It is seriously silent. And it comes with a low noise adapter that makes it even silenter.
Maybe the Phantom Spirit Evo is the greatest cooler in terms of cooling, and it is reported to be fairly quiet as well. I haven't used one myself. I have the NH-D15 and it is worth paying for.
For cooling performance alone, the Thermalright is a little better and costs less money, that's true.