Actual JF server: rpi4, want to upgrade. What should be my next hw choice?

[taladr0]

Hi, after many years with my rpi4 docker JF server I´m thinking about upgrading it.
Mainly because even when I have a 10gbps fiber installation my friends abroad complain about them not having smooth playback.
Also to grow my 4K collection with more {topic we don't talk about - TDP} stuff which needs heavy lifting.

For a 24/7 unattended server what would you reccomend?

is Orange Pi an option?
must I go back to ugly windows?

I´m looking for a modest cost solution and not very energy demanding.

thanks