I still think it's better to leave SBCs behind and get a refurbished Dell. Cost is nearly the same as inflated pi costs but power is stable, more faster cores and more memory.

But if you must go with SBCs just for small form factor / cutefactor reasons...

RockPro is decent, but these days I'd recommend getting an SBC with at least 8GB of ram

https://hackerboards.com/?exclude=discontinued&memory_max=33