Technology

From what I've gathered from various sources:

• Orange Pi: Good documentation, but prices of newer models are not as affordable as previously
• Radxa/Rock: Poor hardware support apparently
• Pine64: Amazing hardware variety (phone, smartwatch, IP camera, soldering iron), but documentation can be hit or miss. Check the Pine64 wiki and search around for other documentation by community members
• Khadas: Good documentation, and support directly from the hardware developers, but this comes at a cost
• MilkV: Poor documentation - Ideal if you want to tinker
• Libre Le Potato: Generally hear positive things about their hardware. Hundreds of these were used on a recent YT project in lieu of a Pi with great success, so may be worth a look.

Another thing to check would be Armbian's site - if something is supported by that distro, it might be worth taking a closer look at

A lot of the companies producing these "Pi killers" made them to survive the shortage, because their Pi accessories weren't selling. This means that generally they'll work great with the accessory, but support may be hit or miss outside of that.

I would lean towards Orange Pi personally, mainly due to cost and how long they've been around. Avoid the very early models as there were some overheating issues on a minority of the Allwinner chips - iirc their recent boards are using Rockchip instead.

Edit: add Libre Le Potato