Exactly why I wrote first the oVirt guide, then after the CentOS future took a dark turn, I turned to KVM on my current Ubuntu setup; I wanted to finally move away from my Home Assistant Container setup.
Though I must (shamefully) admit that a few complications (well, time constraints since I want to move ZigBee from DeCONZ to ZHA, and I have a lot of devices that need to be re-paired) means that I wrote the guides, and tested, but my main Home Assistant is still the container… I did tell my girlfriend that I wanted 48 hours undisturbed for my birthday, so let’s see!
Well, I hope you find something. Though my experience is that once the Home Assistant setup grows, an RPi quickly becomes insufficient, even if only running Home Assistant. So you might be better off looking at e.g. an Odroid. If you need x64, the H2+ is the way to go, though the Home Assistant Blue uses the N2+ (maybe because ARM typically uses less power?).