⭐ Merited by JayJuanGee (1)
A Pi is though much more compact and easier to tuck away, I was thinking of still getting a model 4 with the Argon One m.2 case (https://thepihut.com/products/argon-one-m-2-raspberry-pi-4-case). However, I'm hopefully getting my Futurebit Apollo soon whose SBC should have even more power than a Raspi, and will try to install Lightning onto that. Would also be a nice compact solution and having a compact full node with LN and a hashboard would be really sick, let's see how it will work out 
I have a Argon One m.2 sitting on my desk running a node in a box (raspiblitz)
The Apollo is good, but keep in mind that it's a custom build, so unless something has changed in the last few weeks, you can't just update it, you have to wait for futurebit to release an OS / whatever update. And it's only a 512 GB drive so not a lot of room there for other stuff once you have the full node running.
Remember that the m.2 for the argon is SATA NOT NVMe for the m.2 slot so you have a much smaller choice of what drives you can use. AND the ssd m.2 are getting harder to find.
-Dave