As most things in life...it depends. Most especially when it comes to budget and how heavy your processing tasks are.
I'm more than a casual user and can tell you that I'm running the latest version of Photoshop 2022 (23.0.2) on a Windows 10 machine. Fell for the Mac cult on one round but burned out the motherboard in less than 3 years and went back to Windows. Do with that what you may.
I've always aimed for the middle - not for the cheapest I could get to run the software but more than enough to handle tasks at hand. Here's my setup:
Dell XPS 15 7590
15.6" display
OS - Windows 10, 64 bit
Processor - Intel Core i7-9750CPU @ 2.60HHz
NVIDIA GeForce GTX 1650 graphics card
512GB hard drive and separate WD hard drive for back up and additional storage
Full specs can be found here:
Visit the post for more.
laptopmedia.com
Also added on a separate Samsung 27" display that works just fine although I wouldn't mind upgrading at some point.
Color is fine and working in the larger 27" space is easier to deal with especially in these aging eyes.
Adobe does have minimum recommendations for both Mac and PC but remember they're minimum:
System requirements for running the latest release of Photoshop on macOS and Windows.
helpx.adobe.com
My philosophy has always been not to buy the cheapest but the best you can afford. Start with minimum requirements and work up from there. As far as brand, you can read the reviews but it's the one you feel most comfortable with.
Best of luck in the search. There's usually some pain asociated with firing up a new machne but it does make a huge difference in how you process your work.