I recommend this guide. It’s in German, the prices are in €, but it is a good recommendation of parts for different budgets and up to date.

Under German law it is possible that a brand name becomes a generic name if the population uses it enough. It happened to Tempo, for example.

I recommend a look at !unicorn@lemmy.ml to see what ricing can do.

Basically, ricing means adjusting the optics of your desktop beyond a wallpaper.