No experience with non-official ones. However, are you looking at all models of Raspberry Pi? It doesn't have to be the latest, most powerful one. Reef-Pi runs just fine on the RPi 3 or even the Zero W.
As a test, I picked up an Orange Pi 2G-IOT ARM Cortex-A5 32bit. Useless...
It will run reefpi, however, there are too many issues and it chokes right out of the gate. No interface, no sensors, nothing..
And this thing is so painfully slow as to be not useful for much other than holding down a few sheets of paper on my desk. And I suspect it won't do that very well.
