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)
So far so good, I have been so busy at the office beyond the initial install and adding some BTC and opening some channels I have not done a lot of testing.
I have used RPi and raspiblitz before so other then the case / drive type change it's all the same so I don't think there will be any issues.
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.
Q: I updated the system and now my Apollo won't boot
A: DO NOT UPDATE THE OS THROUGH THE SYSTEM UPDATE PROMPTS Even though the Apollo is a full linux desktop, its still an embedded system with multiple system level changes to make it work with our proprietary hardware attached to it. If you do a system level OS update these will be whipped and you will end up with a bricked system, requiring a full SD card reflash using the stock image. Any system/kernel level updates will issue here with updated SD card images.
A: DO NOT UPDATE THE OS THROUGH THE SYSTEM UPDATE PROMPTS Even though the Apollo is a full linux desktop, its still an embedded system with multiple system level changes to make it work with our proprietary hardware attached to it. If you do a system level OS update these will be whipped and you will end up with a bricked system, requiring a full SD card reflash using the stock image. Any system/kernel level updates will issue here with updated SD card images.
The problem is that they may or may not rely on some package that is different then what you need for what you want. Update the wrong thing and.....
Although they do say you can install other packages and even encourage it. It still worries me that if what I need to run has a dependency that is slightly newer / older then what is on the unit it can cause an issue.
They say it's only system level changes but still would rather not have to worry about it. That's just me you may have more free time to shrug it off and start fresh.
-Dave